Most of the time, when you connect an external hard drive to your Mac’s USB port, you soon see it mount on the desktop. Apple likes to ensure these are easy to find, so they also appear in the Finder in the left-hand column under Devices, since Mac’s treat them the same way as another computer.

However, sometimes, an external hard drive doesn't show up. It’s annoying, especially when you need to transfer something right then. And besides, there can be a risk that data on the external USB pen, hard, or flash drive is corrupt, which means you can’t transfer what you need between devices at all.

Shop for Mac external hard drives at Best Buy. Compare and read customer reviews to purchase the Apple hard drive that fits your needs. Discover the world of portable hard drives for Mac. Compare portable models for office or home and shop online.

Open an External Drive Not Showing on Mac

Get a huge set of top utilities for troubleshooting external hard drives not mounting on a Mac

Corrupt data can be one reason your Mac won't recognize an external drive, but there are other reasons too. Let’s take a look why this is happening and how you can get an external drive to appear on your Mac and get recover data to access to your documents.

How to fix an external disk drive that won't show up on a Mac

Why an external disk drive is not showing up? There could be a few reasons why a USB flash drive isn’t making an appearance.

Start with the basics:

1. Check whether the drive is properly plugged in. It sounds obvious, but since this relies on a wire - either a USB cable or HDMI cable - if it’s not connected properly then it won’t appear on your desktop.
2. Faulty cable. Assuming it’s plugged in correctly, not wobbly or loose, the cable could be at fault. Try connecting the same device with a different cable.
3. Damaged USB or flash drive port. It could be a hardware issue with the Mac. If you’ve got another port, try connecting the device to that one.
4. Reboot your Mac. Sometimes, if a USB disk won't boot, the cause is macOS issue. Hopefully, some data damage that can be fixed by restarting. Choose the Apple menu > Restart. Or press and hold the power button and, when a dialog box appears, click the Restart or press R. Restarting your Mac essentially clears your macOS’s memory and starts it up fresh.
5. Incorrectly formatted drive. Not every external drive is optimized for Macs. It could be that you are trying to connect something only fit to interact with Windows devices. If you’ve got a PC or laptop, it’s worth connecting and seeing if you can access the files through another device. The best way to look for an incorrectly formatted drive is to go to
   Apple (in the top toolbar menu) > About This Mac > Storage.
   See if the external drive shows up here. For more information, go to the same menu option, then select System Report.
6. Mac not formatted to display external drives on the desktop. It could be that your Mac already recognizes the device, but just isn’t showing its icon on the desktop screen. Even if that is the case, the drive will still appear in the left-hand column of the Finder menu under Devices. You should be able to access your drive that way, and, in the Finder menu under Preferences > General, you can check External Drives to ensure that from now on it shows up on your desktop too.
7. Reset NVRAM. To do this, shut down or restart your Mac, switch it back on and immediately press these four keys together for at least 20 seconds: Option, Command, P, and R. It should look as though your Mac has started again; if it has, release the keys when you hear the second startup chime. Hopefully, the hard drive has shown up now.
8. Check Apple’s Disk Utility to see if an external drive is showing up. Disk Utility is within System Preferences, or you can find it using Spotlight. If it is visible, then click the option to Mount, which should make it visible on the desktop and in the External Drives option in the Finder menu.

Unfortunately, if none of those options has worked and the external drive still isn’t visible, then it could have crashed, or be well and truly broken. But there might still be a way you can recover the data on the external drive.

How to show connected devices in Finder

1. Go to the Finder menu and select Preferences (Cmd+comma).
2. From General tab tick External disks to ensure that from now on it shows on the desktop.

In the Sidebar tab you can choose which folders and devices will be shown in the left-hand column of the Finder window.

How to add cloud storages to Finder

You can also mount cloud storage as local drive on your Mac. By connecting Google Drive, Dropbox, or Amazon to your computer, you get more space for securely accessing and sharing files. For your ease, add cloud drives to Finder with CloudMounter app, so that you keep them close at hand. You can read detailed instructions on managing cloud storage as local drives here.

Repair the failed external drives with First Aid

If your drive is having problems, you can try to fix them yourself with First Aid and therefore get access to your files. First Aid tool will check the disk for errors and then attempt a repair as needed. It helps to verify and repair a range of issues related to startup HD and external drive problems. If you are able to fix the hard drive or SSD in your Mac (or an external drive) using Disk Utility you will hopefully be able to recover your files.

To run Fist Aid on an external hard drive:

1. Open Disk Utility. You can searching for it using Spotlight Search or via Finder > Application > Utility
2. Check on your external hard drive, click the First Aid tab and select Run to start running diagnostics.

If First Aid successful in fixing errors, the external drive should be available to mount. If the utility unable to repair issues, your drive truly is broken or formatted using a file system that the Mac cannot read - in this way we suggest you follow the next steps to recover data from a damaged disk drive.

How to recover data from a crashed drive

Portable Hard Drive For Mac Format

Thankfully, there is an app for that. Disk Drill is the world’s premier data recovery software for Mac OS X. Powerful enough to retrieve long-lost, mistakenly deleted files from Macs, external hard drives and USB drives and camera cards.

Get a file recovery app

With Setapp you get a pack of professional tools for file recovery and Mac maintenance.

An easy way to recover lost files on an external hard drive

Providing you already have Disk Drill Pro version, which you can get automatically by downloading from Setapp:

1. Connect your drive to the Mac.
2. Quit all other applications on the Mac, especially those that may be trying to access the external drive (e.g. iPhoto, Words)
3. Launch Disk Drill.
4. Click on the external drive that you are trying to recover files from. If it has partitions, you will see all of them. If, however, you still don’t see any volume to the external drive then you may need to try some of the steps above again or read the Disk Drill Scanning FAQs.
5. To avoid the external drive being accessed during the recovery process, click Extras next to the drive or drive partition or file, then select Remount Volume As Read Only. A padlock will appear, protecting the drive during the process.
6. Now click Rebuild (or Recover) next to the file(s) you are trying to recover. Once the scan is finished - it may take some time if the files are large - a list of files will appeal.
7. Next, click Mount Found Items as Disk button on the bottom-left below the scan results.
8. Disk Drill “strongly suggest saving the files to a different drive than the one you are trying to recover files from. Saving to the same drive substantially lowers your chances of recovery.”
9. A drive icon will appear, which once you double click will give you the option to open the files as you would do before they were lost. Drag them to another location, such as your desktop or a folder on your Mac.
10. Open the files to ensure they have been recovered properly and safely eject the external drive.

Disk Drill does have other ways to recover lost files but assuming there aren’t complications, this method is the most effective. Disk Drill Pro recovery app is available from Setapp, along with dozens of Mac apps that will make your life easier. Never have to worry about a crashed or corrupted external drive again.

A few more tips on getting your files back

1. Macs and third-party apps that look after Macs, such as Disk Drill and iStat Menus come with a S.M.A.R.T. (also known as Self-Monitoring, Analysis and Reporting Technology) status monitor. If a SMART check reports errors, then it could mean the hard drive is at risk of failing completely. Within Disk Utility and Disk Drill, there are several solutions for this: Repair Disk Permissions and Repair Disk. If neither work, it’s recommended that you backup all of the data from the disk, erase, then run a SMART check again. The external hard drive should show up as Verified.
2. Partitions can get lost within hard drives, temporarily hiding all of the information contained within. Disk Drill can help to identify and restore this information.
3. Within Disk Drill, you can restore data when a hard drive is damaged or add formatting, which is also something Disk Utility can help with.
4. CleanMyMac, another useful app available from Setapp, can help you identify external hard drive errors and repair them. It is an essential tool worth trying when you’re having external hard drive difficulties.

Try all these apps for free

Get a huge set of top apps for keeping your Mac in shape. Best utilities in one pack, give it a go!

Alternative ways to recover data from an external hard drive

Reset the System Management Controller (SMC) if your Mac shuts down when you plug in an external hard drive. Then use a different port to connect the external hard drive. If you’ve got a battery that you can’t remove:

• Shut down and unplug the power adapter
• Press Shift-Control-Option and the power button at the same time. Do this for 10 seconds
• Release all keys
• Plug the power adapter back in and switch your Mac back on

For Macs with removable batteries, you need to switch them off, remove the battery, then press and hold the power button for 5 seconds. After that, put the battery back in, plug in the power adapter and switch the power on again.

What’s your file format? One reason your Mac isn’t recognizing the hard drive is the file format. Windows uses NTFS file formats, while Macs, up until the introduction of Sierra, have used HFS+. Now, Apple has introduced the Apple File System (APFS) for newer operating systems. It is possible to format a hard drive so it can be read on Mac and Windows computers, providing you format using exFAT. However, if you’re having problems accessing the files and the issue is due to formatting, you will need to connect it to a device it can be read on, and then format the files correctly for the computer you are going to use it on next.

How to make Ext2/Ext3 drives readable on Mac

Portable Hard Drive For Mac Reviews

The common issue is Ext2- and Ext3-formatted drives are not readable on macOS. There are two ways to access such external drives on your Mac – via Linux OS or FUSE system. The easiest would be installing Linux to a secondary drive or virtual machine.

If you go with Linux installation, dual boot your Mac with Linux on another drive and use FAT32 as a transfer intermediary. If you don’t have a drive to install Linux to, use virtual machine as an interface for it. Transferring can be done the same way – with FAT32, or via network.

Another option for reading Ext2/Ext3 disks is mounting disk with Filesystem in Userspace (FUSE). Basically, it works as an extra interface enabling file system access via specially installed modules. Here’s how to mount drives with FUSE:

1. Install FUSE for macOS or MacFUSE as well as fuse-ext2 module.
2. Use the following Terminal command to enable Disk Utility’s debug menu and see all partitions: defaults write com.apple.DiskUtility DUDebugMenuEnabled 1
3. Attach your Ext2/Ext3 drive and locate the device name via Disk Utility.
4. In your user account, create a folder to be used as a mount point.
5. Use the following Terminal command to mount the drive as read-only: fuse-ext2 /dev/disk2s2 /Volumes/mountpoint
6. For write support, use the command: fuse-ext2 -o force /dev/disk2s2 /Volumes/mountpoint

And that’s not the only case where Terminal helps you access external drive.

Employ the handy all-powerful Terminal, which always comes forward with solutions for difficult problems. Especially if System Information does recognize the USB or hard drive, but continues to hide it from you, disconnect the drive and try to find it using the Terminal, which you can find in Applications > Utilities.

• Once in the Terminal, type in the command diskutil list
• A list with information about volumes and drives should appear
• Look for a section labelled /dev/disk_ (external, physical)
• Make a note of the whole line after the word disk
• Now put the following command into the Terminal diskutil info disk followed by the number or digits assigned to that disk
• Now you should see detailed information about the drive, therefore confirming that your Mac can and does recognize it
• Eject using the Terminal by entering the command diskutil eject disk followed by the number or digits assigned to that disk
• Physically remove the disk from you Mac
• Plug it back in and your Mac should recognize it

Console is also reliable when it comes to solving tricky problems, although it isn’t always that easy to use. You can find Console under Applications > Utilities > Console. Console shows if an external drive or any error is detected under the Errors and Faults tab. If no errors show up, then the problem is not caused by the device.

To sum up, there are lots of potential solutions for a Mac not reading an external hard drive. If we were to pick one, Disk Drill seems to be the most well-rounded, offering plenty of customizations and power in an easy-to-use interface. Disk Drill Pro recovery app is available via Setapp, along with 150+ Mac apps that strive to make your life much much easier. At the very least, you’ll never have to worry about a crashed or corrupted external drive ever again.

BestExternal Hard Drives for MaciMore2019

When it comes to storing data, personal information, and essential documents, you can never be too safe. External hard drives are not only useful for storing data but are an excellent way to transport files from one location to another. When you take into account price, ease of use, and portability, the Seagate Backup Plus Slim is the most reliable hard drive you can carry around with you at all times.

Best Overall: Seagate Backup Plus Slim (2 TB)

If you want a reliable external hard drive that has a decent amount of storage, is super easy to carry around and has a very affordable price tag, the Seagate Backup Plus Slim is the best option for most people. Formatted for Windows and Mac right out of the box, it's easy to carry all your essential documents from desktop to laptop without missing a beat.

The Seagate Dashboard back up system is a fantastic simple tool that can let you schedule backups to ensure you never miss any critical files you need in case something terrible happens to your computer. You can set automatic backups daily, weekly, or monthly, and change the frequency whenever you want.

Seagate also throws in a one-year complimentary subscription to Mylio Create. This can help you wrangle your photo library if you don't already use some photo managing tool, and a two-month membership to Adobe Creative Cloud Photography Plan.

Pros:

• Affordable
• Great backup software
• USB 3.0
• Metal enclosure

Portable Hard Drive For Mac Computer

Best Overall

Seagate Backup Plus Slim (2 TB)

Reliable, portable, and affordable.

Don't worry about lengthy setups or formatting procedures. Plug in the Seagate Backup Plus Slim 2TB which is formatted for Mac right out of the packaging.

Best USB-C hard drive: Samsung T5 Portable SSD (1 TB)

This small compact SSD drive from Samsung comes with both a USB-C to USB-C cable and a USB-C to USB-A, meaning it's perfect to use with your MacBook or Mac.

Its fast 540 MB/s read and write speeds are more than enough to transfer any file. And should be able to store all your photo and video files with ease thanks to its straightforward software. Plus, if you're worried about encryption, the Samsung T5 Portable SSD has you covered with an optional password to launch the drive, and AES 256-bit hardware encryption on all your files.

Pros:

• USB-C
• SSD
• Super compact
• AES 256-bit hardware encryption

Best USB-C

Samsung T5 Portable SSD (1 TB)

Fast and encrypted

With 540 MB/s read and write speeds the Samsung T5 Portable SSD is fast enough for photographers and videographers to transport all their work.

Compatible with Time Machine right out of the box, the 8 TB storage capacity on the Western Digital My Book is perfect for people looking for a lot of stage at a reasonable price. It's USB 3.0 meaning it's easy to take advantage of its storage speed with fast transfer speeds.

While portability is not the Western Digital My Book's strong suit and it needs a separate power source, it does offer 256-AES encryption when you download its easy-to-use security software. It ensures all your important files and documents stay private.

If you're looking for a drive that has lots of space, os you don't have to have multiple as your storage needs grow, look no further.

Pros:

• Lots of storage
• 256-AES encryption
• Time Machine compatible

Best Capacity

Western Digital My Book (8TB)

Lots of storage for those who need it

Western Digital offers 256-AES encryption when you download its security software, meaning you can rest easy knowing your private information and personal data is safe.

Best Thunderbolt 3 Drive: LaCie Rugged Thunderbolt

LaCie hard drives have always been good for people on the go because of the rugged design. The LaCie Rugged Thunderbolt can withstand some dust, dirt, and even a tiny bit of water being splashed on it.

It's 7200 RPM Hard drive keeps things running smoothly. And the included USB-C cable — which supports Thunderbolt 3 — makes it perfect for MacBook and Mac users alike!

Cons:

• Only 130MB/s

Best Thunderbolt 3 Drive

LaCie Rugged Thunderbolt

Rugged design with Thunderbolt 3

The LaCie Rugged Thunderbolt 3 is a favorite because it can withstand drops, dust, and even the occasional splash of water, making it easy to carry around!

Best for Legacy Hardware : G-Technology G-DRIVE USB 3.0 (4TB)

While Apple has been going the way of USB-C and Thunderbolt 3 for a while now, some of us still use older hardware and thus don't need hard drives that have USB-C connections. If you're still rocking USB-A or even a Thunderbolt 2 connection from your Mac, the G-Technology G-DRIVE USB 3.0 (4TB) is a perfect companion.

Its all-metal design is not only more durable than plastic hard drives, but it also looks stylish! Plus, it's 7200 RPM speed allows the G-Technology G-DRIVE USB 3.0 to achieve 195 MB/s read and write speeds. This makes it fast enough to transfer large video files quickly and efficiently.

Cons:

• Needs to be reformatted for Windows

Best for legacy hardware

G-Technology G-DRIVE USB 3.0 (4TB)

Stylish and fast even on older computers

With 7200 RPM, this hard drive works hard and fast to get your files transferred quickly. Plus, it uses USB 3.0, and it even has a Thunderbolt 2 port.

The CalDigit Tuff does the best it can to live up to its name, giving you a hard drive that isn't as delicate as most. Its official IP rating is IP57, meaning it can be submerged in 3-feet of water for 30 mins and come out the other side functional. That's not all; this Thunderbolt 3 compatible drive can also withstand falling from about 4-feet high. We still don't suggest that you purposely abuse the CalDigit Tuff. Still, it's always good to have peace of mind when you're carrying your hard drive around.

Portable Hard Drive For Mac Best Buy

Cons:

• Only come in 2TB

Best rugged drive

CalDigit Tuff

Portable Hard Drive For Macbook Pro 2017

Can withstand drops and water

Official rated IP57, the CalDigit Tuff can survive an accidental dip into the water and has a great price tag.

If you're used to dealing with giant file sizes and need a hard drive that can handle transfer data fast, the Samsung X5 is one of the fastest SSD's you'll find. Its read and write speeds are 2,800MB/s and 2,300MB/s respectively, and the entire body is made of metal, making it much harder than plastic drives. Plus, The internal frame on the inside is shock resistant for drops from 2 meters.

This SSD comes with Thunderbolt 3 technology included. This you can take advantage of the fast speeds on your Mac or MacBook Pro, and it doesn't need any formatting, so it's plug and play!

Pros:

• 2,800MB/s read speed
• Shock resistant
• Thunderbolt 3

Best fast drive

Samsung X5

Incredibly fast SSD

If you need blazing fast speeds for giant files, the Samsung X5 is a monster external SSD that can handle any workload.

Bottom line

The Seagate Backup Plus Slim is the most reliable hard drive you can carry around with you at all times. It is formatted for both Mac and Windows right out of the box, and its easy-to-use software can automatically do backups for you as often or as little as you want.

Seagate also throws in a one-year complimentary subscription to Mylio Create. This program can help you wrangle your photo library if you don't already use some photo managing tool. A two-month membership to Adobe's Creative Cloud Photography Plan means it's perfect for budding photographers as well.

Credits — The team that worked on this guide

Luke Filipowicz is an iMore staff writer who has been carrying around his Seagate Backup Plus Slim since his college days.

Lory Gil is the Managing Editor of iMore and an avid believer in having as many backups of your important files and documents as possible.

Rene Ritchie is the foremost authority on all things Apple and has insider knowledge about the goings-on at the biggest tech company in the world. When it comes to accessories for Mac, Rene has used them all.

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Portable Hard Drive For Mac And Pc

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2019 Best External Hard Drives

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