USB Drive Not Showing Up? How to Get Your Computer to See It
You plug in your USB stick or external drive and… nothing. No pop-up, no new drive in File Explorer or Finder. Don't panic, and don't format it yet. In many cases the drive is fine and your files are still there.
Step 1: Try the simple things
• Try a different USB port, ideally one directly on the computer rather than a hub or the front of a desktop case.
• Try a different cable for external drives. Cables fail more often than drives do.
• Try another computer. If it works there, the problem is your computer, not the drive.
• Listen and look. Does the drive light up or spin? No sign of life at all suggests a power or hardware problem.
• Give large drives power. Some bigger external drives need their own power adapter, or two USB ports.
• Try a different cable for external drives. Cables fail more often than drives do.
• Try another computer. If it works there, the problem is your computer, not the drive.
• Listen and look. Does the drive light up or spin? No sign of life at all suggests a power or hardware problem.
• Give large drives power. Some bigger external drives need their own power adapter, or two USB ports.
Step 2: Check whether the computer can see it at all
Windows: Disk Management
Press Win + X and choose Disk Management. Look for your drive by its size.
• It's there but has no drive letter? Right-click the partition → Change Drive Letter and Paths → Add, and choose a letter. It should now appear in File Explorer.
• It says "Unallocated" or "RAW"? The drive's file system may be damaged. Don't format it if it holds files you need (see Step 4).
• It isn't listed at all? Check Device Manager (right-click Start) under Disk drives and Universal Serial Bus controllers for warning icons.
• It says "Unallocated" or "RAW"? The drive's file system may be damaged. Don't format it if it holds files you need (see Step 4).
• It isn't listed at all? Check Device Manager (right-click Start) under Disk drives and Universal Serial Bus controllers for warning icons.
Mac: Disk Utility
Open Disk Utility (search with Cmd + Space) and choose View → Show All Devices.
• Greyed out? Select it and click Mount.
• Errors? Select it and run First Aid.
• Also check Finder → Settings → General / Sidebar and make sure External disks is ticked. The drive might be connected but hidden.
• Errors? Select it and run First Aid.
• Also check Finder → Settings → General / Sidebar and make sure External disks is ticked. The drive might be connected but hidden.
Step 3: Check the format
Drives formatted for one system don't always work on another:
• NTFS (Windows) drives are read-only on a Mac.
• APFS or Mac OS Extended (Mac) drives aren't readable on Windows without extra software.
• exFAT works on both. It's the best choice for a drive you move between Windows and Mac.
• APFS or Mac OS Extended (Mac) drives aren't readable on Windows without extra software.
• exFAT works on both. It's the best choice for a drive you move between Windows and Mac.
Changing the format erases the drive, so copy your files off first.
Step 4: If it holds important files
If Windows offers to "format the disk before you can use it," click Cancel. Formatting starts the drive again from scratch.
Instead:
• Try the drive on another computer, which can sometimes read what yours can't.
• Use data recovery software such as PhotoRec (free) to copy files to a different drive.
• If the drive clicks, grinds or isn't detected anywhere, stop using it and contact a professional recovery service. Every attempt to read a failing drive can make things worse.
• Use data recovery software such as PhotoRec (free) to copy files to a different drive.
• If the drive clicks, grinds or isn't detected anywhere, stop using it and contact a professional recovery service. Every attempt to read a failing drive can make things worse.
How to avoid this next time
• Eject before unplugging: use Safely Remove Hardware on Windows or the eject button in Finder on a Mac.
• Don't keep your only copy on a USB stick. They're easy to lose and they wear out. See our backup guide.
• Handle drives gently, especially spinning external hard drives while they're running.
• Don't keep your only copy on a USB stick. They're easy to lose and they wear out. See our backup guide.
• Handle drives gently, especially spinning external hard drives while they're running.
The bottom line
Try another port, cable and computer, then use Disk Management or Disk Utility to see whether the drive is detected. And if it holds files you care about, don't format it until you've recovered them.
