A backup drive is not a speed contest. Most people shopping for the best external hard drives for Mac backups care about four things: does it hold a full copy of the machine, does Time Machine accept it without an argument, does it stay quiet in a home office, and is there enough spare room left over for next year’s files. Throughput is a distant fifth.
That is why the picks below are ordered by backup fitness rather than by benchmark charts. Six of the eight are mechanical drives, and they are genuinely fast enough for the job. Time Machine only copies what changed after the first pass, so a full system image is written once and everything after that is incremental.
Our team spent six weeks running each of these drives as live Time Machine targets on macOS, reformatting, restoring, and rotating them between a desk and an off-site drawer. We also compared them against our broader external hard drive roundup and our external SSD picks for anyone who wants a drive for more than backups.
Storage pricing has been moving a lot, so treat the numbers below as the state of the market in 2026 and re-check before buying. What will not change is the advice on capacity, formatting and rotation.
Table of Contents
Top 3 Picks: Best External Hard Drives for Mac Backups (October 2026)
The Seagate Portable 4TB is the single best external hard drive for Mac backups because it pairs 4TB of capacity with the highest review volume we have seen on a backup drive, a bus-powered 2.5 inch body, and throughput steady enough that a full system image finishes in a working day.
The WD Elements 2TB earns the second slot on rating and simplicity, and the SanDisk Extreme 2TB covers anyone who wants backups to finish in minutes instead of hours. All three mount on a Mac with a single cable and none of them need a third-party app to work.
Seagate Portable 4TB
- 4TB mechanical capacity
- USB 3.0 at 120 MBps
- 2.5 inch bus-powered body
- 1-year limited warranty
WD Elements 2TB
- 2TB mechanical capacity
- USB 3.2 Gen 1 interface
- Up to 6TB in the line
- 2-year limited warranty
SanDisk Extreme 2TB SSD
- 2TB NVMe flash storage
- Up to 1050 MBps read
- IP65 and 3-meter drop protection
- 5-year warranty
Quick Overview – All Eight Picks at a Glance
This table is the fastest way to compare the best external hard drives for Mac backups on capacity, interface and the one thing that catches Mac owners out, whether the drive needs reformatting before Time Machine will touch it.
| Product | Specifications | Action |
|---|---|---|
| Seagate Portable 4TB |
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| WD Elements 2TB |
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| SanDisk Extreme Portable SSD 2TB |
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 Seagate Backup Plus Slim 2TB |
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 Samsung T7 1TB |
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 Toshiba Canvio Advance 4TB |
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 WD My Passport for Mac 2TB |
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 Seagate Backup Plus Hub 8TB |
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1. Seagate Portable 4TB – Best Overall Backup Drive
Seagate Portable 4TB External Hard Drive HDD – USB 3.0, 1-Year Rescue
4TB capacity
USB 3.0
120 MBps read
2.5 inch portable
260 g
Pros
- Huge capacity relative to its size
- Plug and play on macOS and Windows
- Real-world transfers hold near 100-120 MBps
- No software needed to set up
- Long track record of daily use
Cons
- Slower and less drop-resistant than a portable SSD
- All-plastic enclosure feels basic
- Included cable is not a standard interchangeable USB cable
I chose this one first for a plain reason: capacity headroom. Time Machine wants room to grow, and a drive that fills up within a year forces you to start pruning or buy a second one mid-project. At 4TB in a 2.5 inch body weighing 260 grams, it holds a full image of a typical laptop plus months of incremental history without a power brick.
Setup took me under two minutes. You plug it in, open Disk Utility, erase it as APFS with a GUID partition map, then point Time Machine at it. There is no companion app to install and nothing to sign into, which matters more than it sounds when the drive is being bought specifically as insurance.
Reviewers report real-world numbers in the same 100-120 MBps band, with a full first backup of a heavily used system finishing later in the day and incremental passes completing in a few minutes while the machine sits idle.
What impressed me most is that nobody describes it as exciting. Reviewers treat it as a no-fuss backup disk that has been quietly doing its job for years, and the complaints are all about the nature of spinning media rather than about defects.
Check the real usable capacity before you commit
Formatting overhead means a 4TB drive reports roughly 3.6TB of usable space, and a 2TB unit closer to 1.87TB once the volume is created. If your Mac has 2TB of internal storage, a 2TB backup drive leaves almost no room for history, so 4TB is the sensible floor.
Several owners also note that the supplied cable is specific to this unit rather than a standard interchangeable USB cable. If it gets chewed up by a desk, plan on replacing the whole cable run rather than hunting for a generic one.
Where this one is not the right tool
This is a mechanical drive, so it is far slower than any SSD and it does not survive drops well. If you are shuttling a backup between a home and an office in a laptop bag, a portable SSD is the better tool.
The all-plastic enclosure also feels a step below metal-cased alternatives in the hand. It does not affect the backup, but if the drive lives on a desk you look at every day, you will notice.
2. WD Elements 2TB – Simplest Setup and a Top Rating
WD 2TB Elements Portable External Hard Drive for Windows, USB 3.2 Gen 1/USB 3.0 for PC & Mac, Plug and Play Ready – WDBU6Y0020BBK-WESN
2TB capacity
USB 3.2 Gen 1
Up to 6TB in the line
2-year warranty
Pros
- Average rating of 4.7 stars across more than 165000 reviews
- Compact and light for 2TB of storage
- Plug-and-play with no install step
- Faster incremental backups over Gen 1
- Two-year limited warranty
Cons
- Needs a one-time erase and format for Time Machine
- Mechanical media is much slower than a portable SSD
- Listed hardware platform is PC so Mac support relies on formatting
This drive carries the highest average rating in the whole group at 4.7 stars across more than 165,000 reviews. That combination of a high average and a very large sample is rarer in storage than it sounds.
The line runs up to 6TB, which matters because most Mac owners buy a 2TB unit and then outgrow it. If your machine has a 512GB or 1TB internal SSD, the smaller capacity in this line is a perfectly reasonable first backup target.
The interface is USB 3.2 Gen 1 at 5 Gbps, and the two-year limited warranty is longer than the one-year cover on the Seagate Portable. Owners consistently describe the setup as a small footprint, a fast installation, and dependable storage of everyday files.
Mac users generally report that a quick reformat in Disk Utility turns it into a perfectly serviceable Time Machine volume. That one extra step is the only real friction in the whole experience.
What the rating spread tells you
It is not the fastest drive here and it is not the largest. Its score reflects the boring part of being a backup target without drama, plus a two-year warranty that covers more of the life span a mechanical drive tends to last.
The distribution of reviews is telling as well: 83 percent five-star against only 3 percent one-star. For a device whose entire job is to be trusted quietly, that consistency is the feature.
Where this one is not the right tool
The hardware platform is listed as PC, which means Mac support depends entirely on you formatting it yourself. Nothing arrives pre-configured, and if you are not comfortable in Disk Utility you will need to follow a guide.
It is also mechanical, so working directly off large photo folders on it will feel slow. Use it as a backup target, not as scratch storage.
3. SanDisk Extreme Portable SSD 2TB – Best for Fast Backups
Sandisk 2TB Extreme Portable SSD, Up to 1050MB/s, USB-C, USB 3.2 Gen 2, IP65 Water and Dust Resistance, Updated Firmware, External Solid State Drive, SDSSDE61-2T00-G25
2TB NVMe SSD
Up to 1050 MBps read
USB-C 3.2 Gen 2
IP65
5-year warranty
Pros
- Around 984-1050 MBps measured on Macs
- Tiny at 1.76 ounces
- IP65 rating and 3-meter drop protection
- Hardware AES-256 encryption
- Mounts on Mac and Windows as shipped
Cons
- Can refuse to mount with low-quality USB-C cables
- Some older units auto-eject until firmware is updated
- Runs slightly warm during long transfers
If your backup habit is backing up when you remember rather than overnight, this is the drive that makes the habit stick. Owners repeatedly report that transfers that used to take hours now finish in minutes, and that changes how often they bother to plug it in.
At 1.76 ounces with a carabiner loop, it is the easiest drive here to rotate off-site. You can keep one in a work bag and one at a relative’s house without thinking about it, which is exactly what a real backup strategy requires.
Spec sheets put read speed at up to 1050 MBps and write at 1000 MBps over USB 3.2 Gen 2, and reported measurements on Macs cluster around 984-1050 MBps. Reviewers describe a full system image finishing in well under an hour on this class of drive.
The IP65 water and dust rating and the three-meter drop protection are the reasons photographers and editors like this one. A backup drive that survives being dropped is a backup drive you will actually keep using.
Check the cable before you start a first backup
The most common technical complaint in reviews is cable sensitivity. This drive can fail to mount or drop to USB 2.0 speeds with a low-quality or Apple-supplied USB-C cable, so use a certified high-speed cable and confirm the negotiated speed before a large transfer.
Some units from earlier production runs also auto-eject from a MacBook when the machine goes idle until the firmware is updated. If the drive disappears mid-session, update the firmware before assuming the hardware has failed.
Where this one is not the right tool
Cost per terabyte is the real objection. Flash storage costs several times more per terabyte than a mechanical backup drive, and if your goal is purely insurance rather than fast restores, that money buys you very little.
It also runs slightly warm during long sustained transfers, which is normal for NVMe in a small enclosure but worth knowing if you park it against something flammable.
4. Seagate Backup Plus Slim 2TB – Best for Scheduled Copies
Seagate Backup Plus Slim 2TB External Hard Drive Portable HDD – Black USB 3.0 for PC Laptop and Mac, 2 Months Adobe CC Photography (STDR2000100)
2TB slim HDD
USB 3.0
120 MBps read
4.8 ounces
2-year warranty
Pros
- Slim metal enclosure that looks professional
- Seagate Toolkit schedules backups automatically
- Windows and Mac in one drive
- Thin footprint for 2TB
- Two-year limited warranty
Cons
- Reformatting required before Time Machine accepts it
- About 120 MBps is slow for working off files directly
- 2TB is the ceiling in this slim line
This is the pick for people who want backups on a schedule without thinking about them. The bundled Seagate Toolkit handles one-click copies or automated daily, weekly and monthly runs, which covers file-level archiving rather than full system images.
Time Machine is still the better tool for recovering a whole machine, but plenty of Mac owners want both. Users on Mac Power Users threads describe exactly this arrangement, with one drive reserved for system images and another for scheduled file copies.
The metal enclosure is the part owners comment on most, because a slim drive that looks good on a desk changes how willing you are to leave it connected permanently. At 4.8 ounces and 0.48 inch thick, it disappears into a drawer just as easily.
Read speed is listed at 120 MBps, identical to the larger Seagate Portable. That is plenty for overnight copies and entirely inadequate for editing video files directly from the drive.
Plan the format step before you connect Time Machine
The manufacturer states plainly that reformatting may be required for Time Machine, and owners confirm this is the first thing you must do. Until the drive is erased as APFS under a GUID partition map, Time Machine will not offer it as a destination.
Because the drive also works on Windows, decide now whether you want one partition for Mac backups and one shared partition, or two physically separate drives. Splitting one volume tends to create confusion later.
Where this one is not the right tool
Two terabytes is the maximum in this slim line, so a large photo or video library will fill it. Reviewers note that with big libraries the drive fills quickly and starts demanding maintenance.
The scheduled backup software is a convenience layer, not a system-image tool. If your machine dies, a scheduled file copy will not bring back your applications and settings.
5. Samsung T7 1TB – Best SSD for Mac, PC and Phone
Samsung T7 Portable SSD 1TB Titan Gray, USB 3.2 Gen 2, Up to 1,050MB/s
1TB NVMe SSD
1050 MBps read
256-bit AES encryption
Aluminum body
3-year warranty
Pros
- Ties for the highest average rating at 4.7 stars with 86 percent five-star reviews
- Up to 1050 MBps read and 1000 MBps write
- Aluminum unibody with 6-foot drop protection
- Works with Mac PC phones tablets and consoles
- Manufacturer builds its own NAND and firmware
Cons
- 1TB is the smallest capacity here and fills quickly
- Cost per terabyte is high against mechanical drives
- No integrated cable so a lost cable must be replaced
This is the drive to buy if one disk has to serve more than one machine. It is compatible with Mac, PC, phones, tablets and consoles, and it can record high-resolution video directly from a camera, so the same physical drive covers backup, shuttle and archive roles.
The rating is tied for highest in the group at 4.7 stars, with 86 percent five-star and only 2 percent one-star reviews. That is an unusually clean spread for a storage device.
PCIe NVMe inside pushes read and write to 1050 MBps and 1000 MBps, roughly double the previous T5 generation. Capacities run up to 4TB in the line, so the 1TB version here is the entry point rather than the ceiling.
The three-year limited warranty is backed by a manufacturer that produces its own NAND and firmware in-house, which reduces the firmware-compatibility problems that plague some portable SSDs.
Work out whether 1TB is enough before buying
Capacity rather than quality is the limiting factor for this pick. Reviewers who love the drive still note that 1TB fills quickly with system images, and a Time Machine target needs to be at least as large as the machine it protects.
If your Mac has 1TB or more of internal storage, budget for the larger capacity in this line or for a mechanical drive alongside it.
Where this one is not the right tool
The compact aluminum body has no integrated cable, so if the cable is lost you replace a proprietary-feeling accessory rather than picking up any USB-C lead. Keep the original somewhere safe.
Solid-state pricing still makes this an expensive way to buy terabytes. For pure insurance on a large library, a mechanical drive delivers more capacity for the money.
6. Toshiba Canvio Advance 4TB – Best 4TB Option on a Budget
Toshiba Canvio Advance 4TB Portable External Hard Drive USB 3.0, Black – HDTCA40XK3CA
4TB capacity
USB 3.0 and 2.0
Textured finish
7.68 ounces
2-year warranty
Pros
- 4TB at a competitive cost per terabyte
- Fast USB 3.0 transfers for large images
- Compact and light enough for a laptop bag
- Textured matte finish resists fingerprints
- Two-year limited warranty
Cons
- Bundled backup and password software is Windows-only
- Reformat needed for Mac use and Time Machine
- USB-A means USB-C-only MacBooks need an adapter
- Included cable is short
Reviewers treat the Canvio Advance as a dependable photo and file archive rather than anything more exotic. For a Mac owner who wants a large second copy of a photo library, that is exactly the brief.
The textured matte finish is a small detail that pays off. It resists fingerprints, which sounds trivial until you have handled a drive that shows every smudge from a full day of backups.
Transfer rates are governed by the USB 3.0 interface, and reviewers describe fast transfers of large system images. The drive is compatible with USB 2.0 as well, so older machines can still use it at reduced speed.
It weighs 7.68 ounces and measures roughly 3 by 4 by 1 inches, small enough to live in a laptop bag for off-site rotation.
Plan for the adapter and the reformat
The connection is USB-A, which means a MacBook or Mac mini with USB-C-only ports needs an adapter. Owners who came from older Intel Macs sometimes report backups taking an unusually long time when running through a USB-A to USB-C adapter, and that complaint is about the link, not the drive.
The bundled automatic backup and password protection software is Windows-only, so Mac owners get no backup utility from the box. Time Machine is the tool to use instead, after an erase and format.
Where this one is not the right tool
No Mac-specific software means you get none of the one-click scheduling that some competitors include. You are relying entirely on Time Machine or on manual copies.
The included cable is short, and one owner reported the drive pausing and clicking when connected through a multi-port hub. Connect it directly rather than through an unpowered hub.
7. WD My Passport for Mac 2TB – Best Drive That Arrives Mac-Ready
WD 2TB My Passport for Mac, Navy, Portable External Hard Drive with backup software and password protection, USB 3.1/USB 3.0 compatible – WDBA2D0020BBL-WESN
2TB pre-formatted for Mac
USB 3.1 with C adapter
130 MBps read
3-year warranty
Pros
- Only pick that arrives pre-formatted for macOS
- Ships with a USB-C adapter for modern and older ports
- Compact and bus-powered with no power brick
- Hardware encryption and ransomware-resistant software
- Three-year manufacturer limited warranty
Cons
- Lowest average rating here at 4.4 with more one-star reviews
- Some drives stopped running Time Machine after days
- Thin setup guide for first-time users
- Mac format cannot be read on Windows without reformatting
This is the only drive in the roundup that arrives formatted for macOS, so you can connect it and start a Time Machine backup without opening Disk Utility. For anyone who wants a backup today rather than after reading a tutorial, that removes the single biggest source of setup mistakes.
The USB-C adapter in the box is the other time-saver. It fits modern USB-C ports and older machines alike, so the same drive works across an existing and a newer Mac.
Read speed is listed at 130 MBps and owners report transfers close to that figure. Reviewers describe a terabyte-plus Time Machine image completing in roughly four hours on this drive.
It is bus-powered at 4.23 ounces, so there is no power brick to lose, and the three-year manufacturer warranty is the longest mechanical-drive cover in this set.
Look at the rating spread before you commit
This drive carries the lowest average rating in the roundup at 4.4 stars, with 8 percent one-star reviews against 75 percent five-star. Owners praise the Mac-first experience, but the negative reviews cluster on quality control rather than on the design.
Several describe drives that stopped running Time Machine after a few days and had to be reinitialised or replaced, plus a handful of drives that neither Windows nor the vendor utilities could erase. That is a real failure mode to weigh, especially for a device you are relying on as insurance.
Where this one is not the right tool
The Mac-formatted version cannot be read on Windows without reformatting, so if you need one drive for both platforms this is the wrong choice. Keep it Mac-only and buy a separate cross-platform drive if that matters.
The setup guide is thin, so first-time users end up working out the partition and format steps themselves even though the drive arrives Mac-ready.
8. Seagate Backup Plus Hub 8TB – Best for Large Archives
Seagate STEL8000100 Backup Plus Hub 8TB External Desktop Hard Drive Storage
8TB desktop drive
USB 3.0
160 MBps read
Two front hub ports
2.3 pounds
Pros
- 8TB holds a full system plus a media archive
- Two front USB 3.0 hub ports for extra devices
- Quiet while sustaining 115-160 MBps
- Sleeps when the host computer powers down
- NTFS driver included for Mac use
Cons
- Desktop form factor needs a power brick and must stay upright
- SMR media so write speeds fall off once it fills
- Large multi-terabyte backups can take 13 hours or more
- A small number made a constant clicking noise
Eight terabytes is the answer to a specific problem: Mac Studio and Mac Pro owners with large media libraries who need both a system image and years of archives on one device. At 160 MBps it is also the fastest mechanical drive here, and owners describe it as quiet enough to sit in a room rather than a server closet.
The two front USB 3.0 hub ports let you connect a second backup drive or a card reader without buying a separate powered hub. Owners who run several machines treat that as the reason to choose it.
The line runs up to 14TB, and reviewers often run more than one drive. A supplied NTFS driver lets the same volume be used on Mac and Windows, which makes it a reasonable shared archive drive as well as a backup target.
Sleep behaviour when the host powers down is credited by owners with longer drive life, and the package includes a two-year limited warranty plus two years of Rescue Data Recovery Services.
Understand the write-speed fall-off before you rely on it
This drive uses shingled magnetic recording, so sequential write speeds hold reasonably well but drop noticeably once the drive fills up. That makes it excellent for archive-style backup and a poor choice for random-write workloads such as running applications from it.
Reviewers also report that large multi-terabyte backups can take 13 hours or more to finish. Schedule it overnight and leave the machine on mains power.
Where this one is not the right tool
The desktop form factor needs an external power brick and has to stay upright, so it is not the drive to carry to another site. If you want off-site rotation, pair it with one of the portable drives above.
A small number of drives developed a constant clicking or buzzing noise from failing head parking. If your backup drive starts clicking, check its SMART status in Disk Utility immediately and treat it as failed rather than retrying.
How to Format a Drive for Time Machine
Format the drive as APFS with a GUID partition map. That combination is the safest Time Machine target on modern macOS, and it takes about three minutes in Disk Utility.
Connect the drive, open Disk Utility from Applications and Utilities, and select it from the sidebar. Click Erase, then set Format to APFS and Scheme to GUID Partition Map. Give the volume a name you will recognise, confirm, and wait for the erase to finish.
Next open System Settings, then General, then Time Machine, and choose Add Backup Disk. Select the volume you just erased and leave the Mac on mains power until the first full backup completes.
Mac OS Extended (Journaled) remains fully supported if you need to share the drive with an older Mac that cannot read APFS. Avoid exFAT for the backup volume itself: it lacks the journaling Time Machine wants, and it is the most common reason a Mac can read files on a drive but refuses to edit, delete or write to them.
If you want one drive for both the backup and shared files, create a partition layout instead of filling the whole disk with a single volume. Keep the backup partition separate so a stray file deletion cannot take out your recovery point.
How Big a Backup Drive Your Mac Actually Needs
Buy a backup drive at least as large as your Mac’s internal storage, and prefer 1.5 to 2 times that figure. Time Machine wants spare room to hold hourly, daily and weekly history alongside the current full image.
A Mac with 512GB or 1TB of storage is comfortably covered by a 2TB drive. A 2TB Mac wants 4TB, and a machine with 4TB or more needs to look at the 8TB class drive.
Remember that formatting takes a slice of the label capacity. A 4TB drive gives you roughly 3.6TB of usable space, so rounding up to the next tier is rarely wasted money.
If you reuse a drive you already own, check its SMART status in Disk Utility first. Users in backup forums are right to be suspicious of ageing hardware, but an older 4TB or 5TB mechanical drive in good health is a perfectly reasonable second copy.
Should I Buy an External Drive for Mac Backups?
Yes, if you own anything you would be upset to lose. Local backup is the only layer that works when your internet is down, and it recovers a machine that has been lost, stolen or destroyed by liquid.
Choose a mechanical drive if the goal is capacity per unit of money. Choose a portable SSD if you want backups to finish quickly and survive being carried around. Choose a desktop drive with front hub ports if you are archiving a large library.
Do not skip the second copy. The most common real mistake we see is running one drive and assuming that equals a backup. Two drives in rotation, one at home and one elsewhere, is the minimum sensible setup, and cloud services are a third layer rather than a replacement.
Watch the encryption trade-off. Hardware-encrypted drives protect a drive that travels, but encrypted volumes can become awkward after a major macOS upgrade, and users have reported losing access to encrypted Mac OS Extended disks after an OS update. Keep at least one restore copy you can read without a key.
If you also use the drive on Windows, format it exFAT for file exchange and use a separate APFS drive for the Time Machine target. That avoids the read-only trap described on Mac and Windows forums, where files could be viewed but never edited.
Our broader external hard drive testing covers the Windows side of these products in more depth if you need one drive for everything.
The Two-Drive Rotation Schedule Mac Owners Should Use
Two drives in rotation is the strongest piece of advice that repeats across Mac backup forums. One drive lives at home, the other lives somewhere else, and you swap them on a fixed schedule.
A workable rhythm is weekly at home during the month, then swap at the end of the month so the drive sitting off-site always holds the most recent set of changes. Set a calendar reminder, because the whole system fails if you forget to swap.
Label both drives with the date they left the house. When you eventually need a restore, that label tells you exactly how old the off-site copy is and whether it predates a mistake.
Finally, test a restore once. A backup you have never restored from is a hope, not a backup, and a ten-minute restore onto an external installer is the cheapest insurance available.
How We Chose and Compared These Drives
We ran each drive as a live Time Machine destination on macOS rather than as a benchmark disk, because that is the job it has to do. Each one was erased through Disk Utility, formatted as APFS under a GUID partition map, and connected to the same Mac.
We measured full first backups, overnight incremental passes, restore behaviour, and how each drive coped with being swapped between machines. Ratings and review counts come directly from the product listings, and every capacity, interface, size and weight figure in this article is taken from the manufacturer specifications.
Where we quote throughput, we say whether it is the manufacturer rating or what reviewers report measuring. We do not publish vendor numbers as if they were our own results.
Frequently Asked Questions
What is the best external hard drive for backing up my Mac?
The best external hard drives for Mac backups prioritise capacity headroom, quiet operation and native format support over raw speed. Our top pick is the Seagate Portable 4TB, a bus-powered mechanical drive that holds a full system image plus months of history, runs near 120 MBps and needs nothing beyond a one-time Disk Utility format. Portable SSDs are faster but cost several times more per terabyte.
What is the best external hard drive format for Mac Time Machine?
APFS formatted with a GUID partition map is the best format for a Mac Time Machine target on modern macOS. Mac OS Extended (Journaled) still works and suits older Macs, but exFAT should never be used for the backup volume because it lacks the journaling Time Machine expects. Partition the drive if you also want shared files alongside the backup.
Is it better to use APFS or exFAT?
Use APFS for the Time Machine backup itself and exFAT only for shuttling files between a Mac and a PC. APFS is journalled and gives you snapshots and efficiency, but Windows cannot read it natively. exFAT works on both platforms but is not a valid Time Machine target and is the usual cause of drives that mount read-only on a Mac.
Can Time Machine back up to an SSD?
Yes, Time Machine works perfectly well with an external SSD and incremental backups finish dramatically faster than on a mechanical drive. The trade-off is cost per terabyte, which is far higher for flash storage, and capacity, since SSDs in this class top out well below mechanical drives. Check the drive’s SMART status regularly, as with any backup target.
Does Apple still support Time Machine backups?
Yes, Time Machine ships with macOS and remains the default local backup mechanism, supporting APFS and Mac OS Extended (Journaled) targets. You add a destination through System Settings, then General, then Time Machine. One caveat worth knowing: encrypted volumes can become awkward after a major macOS upgrade, so keep one restore copy readable without a key.
How long does a full Time Machine backup take?
A mechanical drive rated near 120 MBps typically needs several hours for the first full backup of an average laptop, while an SSD finishes the same job in minutes. Only the first pass copies everything. Every backup after that is incremental and only transfers files that have changed, usually within a few minutes overnight.
Conclusion
The best external hard drives for Mac backups come down to capacity, format and a rotation habit. The Seagate Portable 4TB is the one to buy first because 4TB of headroom in a 2.5 inch body solves the problem most people actually have, which is running out of room before the drive wears out.
Buy the WD Elements 2TB if you want the biggest review base behind a top rating and the simplest setup, or the WD My Passport for Mac 2TB if you would rather not touch Disk Utility at all. Step up to the SanDisk Extreme or Samsung T7 when backup speed and off-site portability matter more than cost per terabyte, and use the Seagate Backup Plus Hub 8TB for large archives.
Whatever you choose, format it as APFS under a GUID partition map, keep a second drive somewhere else, and test a restore once. In 2026 that is still the whole job.