Buying a Mac can be expensive, so you might not have the money to upgrade its storage at purchase, or you've run out of space on your machine. SSDs are fast but not typically very big. Getting external storage can solve a lot of problems and even make life easier.

You can offload your data from your MacBook's SSD or your iMac's Fusion drive when it fills up, or keep one plugged in 24/7 as a store for any non-performance-critical data. A hard drive is perfect for music, video files and photos.

In this article we round up the best hard drives for every Mac owner, whether your priority is portability, speed, ruggedness, extra features or value for money. Below the reviews we've got general buying advice that explains what you should be looking for.

1. LaCie Mobile Drive: Best for travellers

LaCie Mobile Drive

This hard drive is the best for travellers, as well as our top choice overall.

The LaCie Rugged Secure that we reviewed from LaCie last year is still on sale, and is a good option if you need a really tough portable drive that can take plenty of punishment when you're travelling or working on location. However, there's now only one version left - with 2TB storage - and LaCie's newer range of Mobile Drives provide a much wider range of options, as well as a 'diamond cut' design.

Rather than the neon-orange rubber bumper of the Rugged drives, the new Mobile Drives are wrapped in smart aluminium. They're available in two colours: 'moon silver' and, of course, 'space grey' that is intended to match the latest Mac models (and is only sold through the online Apple Store). The 'diamond cut' design simply refers to the exaggerated angular edges and corners; looks aside, the aluminium casing feels really sturdy - in fact, the 5TB model that we tested weighs in at 400g, and could give someone a serious concussion if you whacked them over the head with it.

There are smaller and lighter alternatives, though, depending on how much storage you need. Prices start at £70/$75 for a Mobile Drive with 1TB storage, while the 2TB model costs £95/$100. Those two drives measure just 10mm thick, 88mm wide and 122mm long, and weigh a more modest 200g.

The 5TB model is twice as heavy and twice as thick (20mm), and costs £160/$170. There's also a 4TB model, which is the same size and weight, but slightly less expensive at £140/$150.

The Mobile Drive has a single USB-C port on the back, but LaCie includes cables for both USB-C and the older USB 3.0, so you can use the drive with any Mac or PC.

The drives can be used with Time Machine for Mac backups, but LaCie's ToolKit app also allows you to 'mirror' individual folders. This is a good option if you use your Mac at work, and have individual projects organised in their own folders. Any folder that is 'mirrored' is automatically backed up and updated as soon as you make any changes to any file within that folder. This ensures that your backups are always up to date with the most recent versions of your files (whereas Time Machine still leaves a one-hour gap between backups).

Our only complaint here is that LaCie's skimpy manual doesn't provide much information about the ToolKit app, or the various formatting options for the drive, simply leaving you to wade through a bunch of FAQ files on its website.

That's our only complaint, though, and the Mobile Drive provides good performance, with write and read speeds both averaging out at 132MB/s in our tests - almost identical to the Rugged Secure drives - while backing up a 5GB batch of iTunes songs took exactly one minute.

2. Seagate Backup Plus Ultra Touch: Best for MacBook owners

Seagate Backup Plus Ultra Touch

This one is the best for MacBook owners.

The Seagate Backup Plus Hub that we reviewed last year is still on sale online, and is an excellent option for desktop storage at home or in an office (and we've got one in our office, proving really useful with its extra USB ports). However, the company recently overhauled the Backup Plus range, putting more emphasis on portable drives for laptop users.

The new models are all compact, portable drives, although they offer a number of different designs and features. If you just want lots of extra storage at a competitive price then the Backup Plus Portable Drive offers either 4TB or 5TB for £125/$130 or £135/$160 respectively. Those large drives are a bit on the chunky side - 21mm thick - so Seagate also offers the Backup Plus Slim with either 1TB or 2TB storage instead. The Slim drives measure just 12mm thick, and cost £60/$80 with 1TB storage or £80/$100 with 2TB.

However, the top-of-the-range model is the new Backup Plus Ultra Touch. Like the Slim drives, the Ultra Touch is available with either 1TB or 2TB storage. It's slightly more expensive, costing £65/$90 and £85/$110 respectively, but has a stylish design that makes it a good companion for your MacBook, and also offers encryption to provide extra security for your important files and data.

The Ultra Touch measures just 12mm thick, 78mm wide and 115mm long, and weighs 151g, so you can easily slip it into a jacket pocket or a bag when you're travelling with your laptop. It's available in either black or white, and finished off with a smart woven fabric that makes a nice change from the dull monochrome colours of most hard drives. There's a standard USB 3.0 port on the back of the drive, and a USB 3.0 cable that will work with any Mac or PC, but Seagate also includes a USB-C adapter so that you can use it with new computers that have USB-C as well.

The Ultra Touch includes the same ToolKit app that is used with the LaCie Mobile Drive that we also review in this group test. The drive can be used for automatic Time Machine backups on your Mac, but you can also use the 'mirror' option in the ToolKit app to automatically back up individual folders so that they're always right up-to-date (and don't have to wait for Time Machine's hourly backups).

The ToolKit app also handles the encryption process for the Ultra Touch, although we found Seagate's manual - or lack thereof - to be rather unhelpful, leaving us to look around for FAQs and information about this encryption and other features on the company's website.

Performance is respectable enough, although the Ultra Plus won't win any awards for high-speed backups. It recorded write and read speeds of 125MB/s and 130MB/s in our tests, and took 110 seconds to back up a 5GB batch of iTunes music files. Even so, that performance will be fine for routine backups when you're travelling, and the encryption option will be really useful if you want to make sure that your private data stays private even if the drive is lost or stolen.

3. Seagate Firecuda Gaming Dock: Best for desktop storage and connectivity

Seagate Firecuda Gaming Dock

The Firecuda is our pick for desktop storage and connectivity.

Seagate's Firecuda range of storage devices is very much aimed at PC gamers, and its new Gaming Dock is festooned with the glowing lights and eye-candy that you might associate with gaming gear. It's not just for gamers, though, as the Gaming Dock is a seriously versatile storage device and Thunderbolt dock that has a lot to offer owners of the latest Macs with Thunderbolt 3.

It is, admittedly, a bit on the bulky side, measuring 270mm wide, 135mm deep, and 51mm high. It weighs 2.67kg - which is more than most Apple laptops - and also includes a separate power brick for mains power. Fortunately, its low-profile design does at least allow you to place it underneath the screen of an iMac or desktop display without taking up too much space.

And while the Gaming Dock is a lot more expensive than a conventional hard drive, it is packed with useful features. The size - and the need for a mains power supply - is due to the fact that it contains both a 4TB hard drive and an additional expansion slot that allows you to upgrade your storage by installing one of the latest NVMe solid-state drives. By default, the 4TB hard drive uses the NTFS format for Windows PCs, but there's a Help file included on the drive that provides information for Mac users so that you can reformat the drive and set it up for your Time Machine backups. There's also a download link for the Mac version of Seagate's Toolkit app, which controls the fancy lighting effects and other features.

In addition to its built-in storage, the Gaming Dock also includes an impressive selection of ports and connectivity features that will be really useful for modern Macs that only have Thunderbolt 3 ports - especially models like the MacBook Air that is limited to just two ports. Tucked around the back are two Thunderbolt 3 ports - one for connecting the Dock to your Mac, and a second port for additional Thunderbolt peripherals. There's a DisplayPort connector for an external monitor and Ethernet for a wired network connection. There are three USB 3.1 ports on the back, and two more on the front, along with two 3.5mm audio connectors for headphones and a microphone. The only real disappointment here is the lack of HDMI, and the fact that the Gaming Dock can't charge a laptop via its Thunderbolt connection (possibly because the Dock's internal hard drive uses up too much juice).

The internal hard drive is a good performer too. It obviously can't compete with the latest solid-state drives, but it achieved consistent speeds of 240MB/s for both read and write performance, and took just 25 seconds to back up our 5GB batch of iTunes songs. That's faster than most of the conventional hard drives we've tested recently - and, of course, the Gaming Dock gives you the option of installing an additional SSD module if you need even stronger performance in the future.

4. LaCie 2big Dock Thunderbolt 3: Best for professionals and video editors

LaCie 2big Dock Thunderbolt 3

This is the best for professionals and video editors.

The LaCie 2big Dock Thunderbolt 3 is much more than just a hard drive. To start, it contains two drives, not just one. We are using the top-end config, which has two 10TB IronWolf Pro disks, designed to handle 300TB a year workloads.

They are enterprise class drives a cut above those you'd buy in a high street electronics shop. It instantly earns extra points for reliability.

Using such high-quality drives in a smart enclosure also lets the LaCie 2big Dock Thunderbolt 3 reach SSD-like speeds when reading and writing large files. We've recorded read speeds of 495MB/s and write speeds of 487MB/s, four times the speed of a standard external drive.

While that still looks slow next to the fastest M.2 SSDs, which can read at around 3500MB/s and write at 2100MB/s, it really isn't that much slower than the ~500MB/s SSDs used in most external drives. And 20TB's worth of SSD storage will currently cost you at least £4000.

Suddenly the LaCie 2big Dock Thunderbolt 3 20TB's £900-1000 price doesn't look so steep.

This isn't a NAS drive or a miniature server box, but it does have several important additional features. A simple LaCie application lets you switch to a RAID 1 setup, where the same data is written to the two drives simultaneously to protect against data loss. This also roughly halves the write speed, though.

You have to choose between great performance and good reliability, or great backup reliability and speed that is simply very good for an HDD.

Either way, the LaCie 2big Dock Thunderbolt 3 looks great next to an iMac. It has an all-aluminium enclosure and a light-up eyeball on the front that glows blue, or red when something has gone terribly wrong.

You're unlikely to encounter too many issues, though, because while this is a high-end unit it still has the simplicity of a consumer product. For example, you can just pull at the aluminium blocks at the front to open-up the drive bays, no cables involved.

The LaCie 2big Dock Thunderbolt 3's connectivity is comprehensive too. There's a 5Gbps USB-C port on the back, and two Thunderbolt 3s. This lets you daisy chain multiple drives.

There's even a full-size DisplayPort, which can pass through the video feed from a connected MacBook to a monitor. This introduces the other side of the 2big's personality, that of a dock.

USB 3.0, SD and CompactFlash connectors sit on the front, particularly useful for photographers.

Any complaints? As the IronWolf Pro drives inside run much hotter than most, the LaCie 2big Dock Thunderbolt 3 uses a fan that sits at the back. This is not a silent box, but the high-quality, low-noise Noctua fan is actually the least noticeable part. The operational noise of the drives themselves is more evident than that of a lower-performance 2.5in drive.

We don't think this is a big issue, but is something to bear in mind if you're looking to plug into an often virtually silent MacBook.

5. LaCie DJI CoPilot: Best for iPhone and iPad (and drones!)

LaCie DJI CoPilot

Hard drives are a pretty mature technology these days, so it's not often that something new comes along. However, LaCie seems to have invented a new type of drive with the DJI CoPilot, which it refers to as a 'BOSS' drive - or 'backup on-set solution'. In our view it's the best of the hard drives here for iPad and iPhone owners.

Rather than simply being used for backing up a conventional laptop or desktop computer, the CoPilot is designed for use on film sets and other outdoor locations when using mobile devices such as cameras, drones and, of course, the iPhone and iPad. In fact, the 'DJI' part refers to a well-known manufacturer of drones, as the CoPilot is particularly aimed at people who are using drones that record video on to SD memory cards, which tend to fill up quickly.

There's only a single version of the CoPilot available, priced at £299.99/$299.99 with a 2TB hard drive. It looks very similar to LaCie's popular Rugged Drive, wrapped up in a sturdy rubber sleeve that helps to protect it from being dropped, or exposed to water, dust and dirt. There's also a three-year warranty that includes LaCie's data recovery service.

The CoPilot is a little larger than the other Rugged Drive models, as it includes a number of additional features that allow it to act as a self-contained storage system for all your mobile devices. The first thing you'll notice is the status screen on the top panel of the drive, which works in conjunction with the CoPilot app for iOS and Android devices. This displays status information, such as the amount of storage available, and allows you to quickly perform backups from SD cards, smartphones and tablets without having to use a laptop or desktop computer. It does, however, require an internal battery for the hard drive and screen, so you'll have to remember to top it up occasionally before you hit the road.

On the back of the CoPilot you'll find USB 3.1, micro-USB and USB-C ports, along with a slot for SD memory cards. LaCie also includes a large selection of cables and adaptors, including Lightning for iPhones, USB-C for newer iPad Pro models, and an adaptor for micro-SD cards. And, if there's one particular cable that you tend to use most of the time, you can connect it to the drive and slot it into a groove in the protective sleeve so it's always there when you need it.

That collection of cables and ports means you can connect just about any type of mobile device you're likely to own, and a quick press of the Action button on the front of the drive tells the CoPilot to scan the ports to see what devices are connected. You can then use the status screen or the app to handle backups and file transfer without needing to carry a laptop with you. Backup speed will vary, depending on what combination of connectors, cables and mobile devices you're using, but the sheer convenience of an all-in-one storage system such as this will be a terrific time-saver for people that work outdoors a lot. There's also an SSD version, called the Rugged BOSS, which can provide greater performance if required.

6. Buffalo MiniStation Extreme: Best for extreme ruggedness

Buffalo MiniStation Extreme

Buffalo's MiniStation Extreme is slightly more expensive than some of its portable rivals, but it's a seriously tough and rugged little drive that will be a great option for people who work outdoors or who enjoy trekking across the Pennines for their holidays.

It does stick with a standard USB 3.0 interface, though, rather than the newer USB-C that is used on the latest MacBooks and Windows laptops. However, there are still millions of people who have USB 3 laptops, so there's certainly an audience for a rugged portable drive such as this.

The MiniStation Extreme is available with either 500GB, 1TB or 2TB storage, with prices around £64, £75 and £105 respectively (and the 1TB model is available in black, red or silver, while the other models stick with plain black). US readers can get the 1TB model for around $135 from HP.

It's not the smallest or lightest portable drive we've ever seen, measuring a rather chunky 21mm thick, 90mm wide and 141mm deep, and weighing in at 277g. You can't just slip it into your pocket when you're on the move, as you can do with some of the portable drives that we review here, but it won't be any trouble to carry it in a case along with your laptop when you're travelling.

And the size of the drive reflects its sturdy design, as the internal drive is wrapped up in a rubber-padded and shock-resistant casing that meets US military standards and is capable of resisting falls from a height of 1.2m. The case is also rated IP53, which means that it's both water- and dust-resistant, so it'll be ideal for use on building sites or in muddy fields at music festivals.

For extra convenience, the drive has an integrated USB cable that is permanently attached, and wrapped in a thick layer or rubber to help keep it safe. The cable is only about six inches long, but we were pleased to see that Buffalo also includes a USB extension cable in case the fixed cable isn't long enough.

Performance is fairly average, hitting a consistent 110MB/s for both read and write speeds, and the MiniStation Extreme took an acceptable 75 seconds to back up our 5GB batch of iTunes music files. That's perfectly adequate for routine backups when you're out and about, and the drive worked fine with Time Machine on my trusty old MacBook Air as well.

Our only minor complaint is that - once again - Buffalo seems a little uncertain about the Mac side of things.

The MiniStation Extreme arrived pre-formatted for a Windows PC, and the QuickStart guide told us to download a piece of software called Mode Changer in order to reformat the drive for use with a Mac. However, we had trouble locating the software on Buffalo's website - and the site also seemed to indicate that it wouldn't work with the current Mojave version of the macOS (although it did run perfectly well on Mojave once we'd managed to download it). The rather confusing hotch-potch of PDF help files was a little irritating as well.

Fortunately, you can use Apple's own Disk Utility to reformat the drive, so you don't need to spend too much time wading through Buffalo's website, and the ultra-rugged design of the MiniStation Extreme will ensure that it earns its keep when you're out in the soggy British summer, or working in harsh environments.

7. WD My Passport Wireless Pro: Best for home entertainment & photographers

WD My Passport Wireless Pro

This is the best for home entertainment & photographers.

It's also perhaps the most interesting drive on test here. You can use the WD My Passport Wireless Pro like a standard wired hard drive, but it also has integrated Wi-Fi and a 10-hour battery.

A thoroughly modern drive, it's set up using a mobile app (for iOS and Android) rather than a laptop. This teaches the WD Wireless Pro your home Wi-Fi network's login so it can become part of your home network.

Within a few minutes it'll appear as a shared network drive, accessible from your MacBook and other connected devices, such as smart TVs. You can view stored videos and photos directly from your phone, again using the app to access them.

Like other smart devices of this ilk, the app is both a strength and a weakness. It allows actions not possible with the average portable hard drive but does crash on occasion.

We like it most as a drive attached to a main laptop or desktop that can be accessed throughout the house without any extra setup involved. It can also be used to backup data wirelessly while out and about, connecting directly to the Wi-Fi networks the WD Wireless Pro transmits. It creates both 2.4GHz and 5GHz (ac) hotspots.

The WD Wireless Pro is great for versatility and convenience, but performance is not best-in-class. When connected with the cable it both reads and writes at up to 110MB/s, around 20MB/s less than the best-performing affordable 2.5in drives.

Also, transfer rates are naturally much slower when backing-up wirelessly. Using the drive's 5GHz band you can expect rates of around 20MB/s. It's a perfectly sound speed if you need to ferry over a few hundred megabytes of data. But if you want to transfer a fistful of gigabytes, plugging the drive in is a better idea.

It has a few extra features, though. The WD Wireless Pro has an SD card slot one side. It's a great way for photographers to back up files quickly out in the field.

There's a multi-purpose 4-LED array on the top too. This shows how much battery left, or how close a file transfer is to being complete.

To recharge the battery you plug the WD Wireless Pro in using the full-size USB port on the back. A smartphone-style power brick is included in the box.

The drive is, predictably, a lot larger than a standard portable hard drive because of all the extra tech required. Its footprint covers about twice the area of an ultra-portable alternative, and it's roughly 20 per cent thicker than a 3TB portable drive.

However, the WD Wireless Pro is still much smaller than a 3.5in external drive and it will fit into a small bag of rucksack with ease. Don't treat it too poorly, though, as it's an all-plastic enclosure with no official ruggedisation.

Remember to switch it off when you're done too as it will otherwise stay active until the battery runs dry. After a few hours' use the WD Wireless Pro's underside feels a little warm, which is no surprise when there is no fan inside.

How to choose the right Mac hard drive

We've rounded up the seven best Mac hard drives above, but before making a buying decision you need to think about how you'll be using the device. To find the best hard drive for your needs, you need to answer a few questions.

How much storage do I need?

Hard drive storage is relatively cheap. Unless you are really out to save your pennies, the smallest size of hard drive we'd recommend is 1TB.

Upgrades to 2TB, 3TB and even 4TB are also cost-effective, often making the bump up to the next model a good idea. Each terabyte can store around 11,000 music albums at 192kbps quality, but such storage doesn't seem so grand when you start archiving 4K video.

1GB of data will store as little as three minutes of 4K video shot with an iPhone 8.

Unless you're happy to have a digital bonfire every year, you also need to consider your future use. We'll use more data in the coming years, not less.

Portable or desktop?

If you think you'll be happy with a 1-4TB hard drive, you can buy a portable drive. These use small 2.5in disks, and as such they fit happily into a coat pocket.

They are usually bus-powered too. This means you just need to plug them into your desktop or laptop, no separate power supply required. There's just one cable, and the drive will barely take up any space.

If only an ultra-high capacity hard drive will do, consider a desktop unit. These use larger 3.5in drives, and tend to cover capacities from 4TB to 12TB.

They'll need to be plugged in for power. That's fine if they'll stay at home 95 per cent of the time, but they are not portable.

Ruggedisation

The choice is clear for those after a drive that can be connected anywhere. You need a 2.5in portable model.

Some of these also offer ruggedisation. Shock protection is the most important kind for a hard drive, as unlike an SSD they have moving parts that can be permanently damaged following a drop.

Rugged drives usually have some form of rubber coating that soaks up impact force, and a toughened enclosure that won't dent, crack or collapse under any normal amount of pressure.

A few also have water resistance. While few are rated IP68 like an iPhone 11 Pro, meaning they can be submerged in water without damage, several can handle rain or water jets/splashes.

What extra features do you need?

Buy a larger drive, though, and you're more likely to get other features. Desktop units may have a built-in "hub", letting you plug in memory cards or peripherals using USB ports.

These are particularly useful if your current setup has limited connectivity, or the USBs you do have just aren't that handy.

Matching the hard drive's connector to those of your laptop is desktop is also essential. You'll get a cable in the box, but it will either terminate with a USB or USB-C shaped plug.

If you have an older MacBook, you'll want the older USB type. A USB-C connector is essential if you own a recent MacBook.

Not all USB-Cs are the same, though. MacBooks support Thunderbolt 3, which has eight times the bandwidth of USB 3.0.

However, in most cases you don't need to worry too much whether a hard drive uses USB 3.0 or Thunderbolt. The disks themselves just aren't quick enough to break through the data speed limits of normal USB 3.0.

Wireless and NAS

Aside from one special wireless hard drive from Western Digital, above you'll find predominantly "normal" external hard drives. There's another category you may want to consider too: a NAS.

These network-attached storage drives connect to your home Wi-Fi to share their data with other devices in your home. That might be a smart TV, Apple TV, a tablet or laptop.

A NAS is particularly useful if you want to set up a media server at home. This is like a wireless jukebox you can fill with videos, photos and music. Read our best NAS drives feature for more.