Review: Seagate's New Backup Plus Slim and Backup Plus Portable Offer Lots of Storage at Low Prices

Seagate in January announced an updated lineup of its popular Backup Plus hard drives, debuting the Backup Plus Slim and the Backup Plus Portable, both of which are now available for purchase and are ideal for those who need lots of storage space at an affordable price.

The Backup Plus Slim and the Backup Plus Portable are your average, run of the mill hard drives. The Backup Plus Slim is the thinner of the two models as it has less storage space, measuring in at 4.5 inches by 3 inches with a thickness of just about half an inch.


The Backup Plus Portable is about the same size but it's close to an inch thick and about twice as heavy (eight ounces vs. four). Neither one of these drives takes up much space, so they're ideal for backup or other purposes and can be tucked away in a drawer afterwards.

Design wise, the two hard drives are made from a black plastic material with a brushed aluminum front plate. The test models I have are in silver, but these also come in black, a light blue color, and red.


The Backup Plus Slim offers 1TB or 2TB of storage, and the Backup Plus Portable is available with either 4TB or 5TB of storage space. Both are formatted to work with either Mac or Windows.

These hard drives are using standard USB-A cables to plug into a computer, which means that you're going to need a USB-A to USB-C adapter if you want to use them with one of Apple's modern Macs.


USB-C hard drives aren't much more expensive than these Seagate Backup hard drives, so it's maybe not even worth picking one of these up if you have a USB-C machine unless you're swapping files between computers and continue to have a Mac or Windows machine that uses USB-A. For older machines that still have USB-A ports, these hard drives will work well, and functionally, they're fine with an adapter on a USB-C machine.


There's nothing special about the transfer speeds of the Backup Plus Slim and Backup Plus Portable. Seagate says they can reach transfer speeds of 120MB/s, and in my tests on a 2016 MacBook Pro with USB-C, I even saw transfer speeds a little bit higher at about 130MB/s.

Backup Plus Portable on left, Backup Plus Slim on right

You're not going to want to use standard hard drives in situations where you need fast file transfer capabilities, but for things like backups where you have hours to let a backup take place, these drives work well.

Both hard drives come equipped with links to register them on Seagate's website, as well as options to download Seagate's Toolkit software for automatically syncing files between mirrored folders on the drive and on your Mac. You can use these with Windows and Mac machines right out of the box without the need to reformat.

Backup Plus Slim

Seagate sells these hard drives with a one-year Create plan for Mylio, photo organizing software that lets you upload photos to the cloud and access them on multiple devices, but after that year, it costs $50/year to use.

Backup Plus Portable

There's also free two month access to Adobe's Creative Cloud Photography plan, which costs $9.99/month to use after the trial period. Both Mylio and Creative Cloud are optional, so you don't need to sign up for them if you're not interested in those services.

Bottom Line


If you've made the swap over to USB-C and only have USB-C machines, Seagate's Backup Plus Portable and Backup Plus Slim probably aren't the best option for you, because you'll need a dongle.

If you still use USB-A machines or a mix of USB-C and USB-A, however, these hard drives are an affordable way to get a lot of storage for things like Time Machine backups, offloading photos, and more.

How to Buy


Seagate's Backup Plus Slim is available from Amazon, with 1TB of storage priced at $55 and 2TB of storage priced at $70. The Backup Plus Portable is also available from Amazon with 4TB of storage priced at $110 and 5TB of storage priced at $125.

Note: Seagate provided MacRumors with a Backup Plus Portable and Backup Plus Slim for the purpose of this review. No other compensation was received.

Tag: Seagate


Top Rated Comments

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18 weeks ago

If you've made the swap over to USB-C and only have USB-C machines, Seagate's Backup Plus Portable and Backup Plus Slim probably aren't the best option for you, because you'll need a dongle.

Or you can get Micro-B to USB-C cable for well under $10.

I think it's a damn shame that Seagate is selling "Mac edition" external disks with USB-A cable. These editions should minimally include Micro-B to USB-C cable.

WD includes both on their "Mac" edition products.
Rating: 5 Votes
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18 weeks ago

I can fit one whole movie on it! What a steal!

You can use it to backup your entire free iCloud account.
Rating: 5 Votes
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18 weeks ago

Slow spinning disc and USB-A? What is this? 1998 revisited?

Still fine for backups.
Rating: 3 Votes
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18 weeks ago
It'd be nice if the review indicated this, but be aware that many of the bigger-storage-size bus-powered USB HDDs are SMR (Shingled Magnetic Recording). SMR drives may appear to have decent write speeds at first, but upon rewriting, SMR means the drive has to rewrite adjacent tracks, meaning rewrites are dog slow. That means the drive test shown in the article would not sustain that ~130MB/s speed.

Even for backups, I would avoid SMR drives if I had any choice in the matter, especially if your backups result in rewriting lots of small files (e.g. syncing incremental changes). The best usage scenario for SMR drives is for writing data that is read much more often than written, e.g. for media storage (not editing) or for archival.
Rating: 3 Votes
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18 weeks ago

Or you can get Micro-B to USB-C cable for well under $10.

I think it's a damn shame that Seagate is selling "Mac edition" external disks with USB-A cable. These editions should minimally include Micro-B to USB-C cable.

WD includes both on their "Mac" edition products.

I always thought "Mac" edition hard drives really meant "We charged you 25% more to format the drive differently!" Sometimes if you're lucky it would be a silver or white colorway so you could coordinate with your iPod and MacBook. I would always just buy regular drives and format them myself. Now I work from tiny SSDs and backup to larger desktop spinning drives. I look forward to going all solid state one day.
Rating: 1 Votes
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18 weeks ago
I recently got the 5TB LaCie (a Seagate brand) from Apple online (they have the exclusive on the Space Grey colour). It's the same price here in the UK from Apple, as this vanilla Seagate one is from Amazon, and is much nicer in design for a portable HDD, featuring USB-C gen.2 port rather than the older port on the Seagate.
(Though obviously it won't make any difference being gen.1 or gen2, given how slow all single HDD's are – it just looks good on the marketing guff!)

https://www.apple.com/uk/shop/product/HMU12ZM/A/lacie-mobile-drive-5tb-external-hard-drive-usb-c-usb-30

Read the detailed review on there.
Basically, they're all portable non-SSD HDD's, so nothing amazing with any of these, just use for backups/mass storage uses only.
Rating: 1 Votes
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18 weeks ago

They seem fairly priced but SSD prices have dropped so much that I have moved on from rotational drives.


Even for backups?
Rating: 1 Votes
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18 weeks ago

It’s just not a big deal. You’d need a cable to hook up a USB C hard drive anyway


Couple of reasons. One is: some people prefer simplifying their lives and one-cable-for-everything certainly does that. The second is: some people figure micro-USB is on the way out, there has to be a convincing reason to buy it.

On the other hand. If the drive remains in one spot (which backup drives usually do), then really it's no big thing because that USB-C-to-micro-B cable will remain in place. But if you regularly take the drive with you, then it's very much an advantage to connect the drive with your charging cable, in a pinch.
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Yep. But archive uses spinning rust.


Interesting. I've got to admit, the price difference isn't as big as I thought. One daily annoyance of Time Machine on spinning rust, is that disconnecting can take ~10 seconds. Is it faster with Time Machine on an SSD?
Rating: 1 Votes
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18 weeks ago
So, why did they name the fat, heavy one "Portable"?
Rating: 1 Votes
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18 weeks ago
They seem fairly priced but SSD prices have dropped so much that I have moved on from rotational drives.
Rating: 1 Votes
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