External hard drive not showing up in Windows 11: how to fix it

Applies to: USB hard drives, portable SSDs and drive enclosures connected to a Windows 11 PC. Most steps also work on Windows 10. Internal drives that vanish after a Windows install or a BIOS change need different checks.

Where is the drive missing?

Windows shows a connected drive in several places, and each one tells you something different. Open Disk Management as an administrator: Microsoft’s Initialize new disks page suggests searching the Start menu for Create and format hard disk partitions and choosing Run as administrator. You can also search for Computer Management, run it as administrator and open Storage > Disk Management.

What you see	What it means	Go to
Not in File Explorer, listed in Disk Management	Windows sees the disk, but the volume has no letter, is offline, locked or unreadable	Read the disk status, Fix 3 to Fix 5
Not in File Explorer or Disk Management, but listed in Device Manager	The hardware connects, but no usable disk reaches Windows	Fix 2, Fix 6
Missing everywhere, no connect sound	Port, cable, power or the drive itself	Fix 1, Fix 7
Error that the USB device isn’t recognized	The USB connection itself fails	Our USB guide (linked in Fix 1)
Shown with a lock icon, files can’t be opened	BitLocker protection	Fix 5
Asks you to format the disk, or shows RAW	Windows can’t read the file system	Fix 4 (don’t format yet)

Read the disk status in Disk Management

Each disk in the lower half of Disk Management has a status under its number, and each partition has a status of its own. Microsoft’s page Troubleshoot Disk Management explains them. The page is written for Windows 10 and Windows Server, and the same tool ships with Windows 11. The statuses that matter for an external drive:

Status	Microsoft’s explanation	Safe next step
Offline	The disk is connected but not active	Right-click the disk and choose Online (Fix 2)
Missing	The disk was available recently but can’t be found; it may be powered down, disconnected or corrupted	Check cable and power, then Reactivate Disk (Fix 1, Fix 2)
Unreadable	Hardware failure, corruption or I/O errors; can also show while a disk spins up	Rescan or restart (Fix 2)
Not Initialized	No valid disk signature: never set up, damaged formatting or a hardware problem	Only initialize if you’re sure it’s empty (Fix 4)
Unallocated (partition)	Space with no volume on it	Only create a volume if you know it’s empty (Fix 4)
RAW (partition)	A partition with no file system Windows can read	Only format if you know it’s empty (Fix 4)
Healthy, but no letter	The volume is fine and just isn’t mounted	Add a letter (Fix 3)

Leave partitions labeled EFI System Partition or Recovery Partition alone. Microsoft says they hold system files, and they’re meant to stay hidden.

Fix 1: Port, cable and power

If the drive doesn’t appear in Disk Management at all, start with the hardware. Microsoft’s troubleshooting page lists these checks for an external disk:

1. Plug the drive into a different USB port directly on the PC, not into a hub, and try more than one port.
2. Try a different cable.
3. Shut down the PC, turn off the drive if it has its own power cord, then turn both back on.

A few more checks are general guidance rather than steps from that page. A worn cable can carry power without carrying data reliably, so a drive may spin up and still not appear. A desktop hard drive in an enclosure needs its power adapter plugged in and switched on; a bus-powered portable drive may not get enough power from a front-panel port or a laptop on battery, so try a rear port on a desktop, or plug the laptop in. If the drive has a Y-cable with two USB plugs, connect both.

If Windows shows a message that the USB device isn’t recognized, or Device Manager lists an unknown USB device, follow our guide to USB device not recognized in Windows 11. It covers USB controller reinstalls, hub power settings and firmware in more depth than this guide does.

Fix 2: Rescan, bring the disk online, restart

When the hardware checks pass and the disk still doesn’t show, Microsoft suggests unplugging it, plugging it back in and selecting Action > Rescan Disks in Disk Management. Then work through the status you see:

• Offline: right-click the disk label on the left (“Disk 1” and so on) and select Online.
• Missing or Offline after a reconnect: check the cable and power again, then right-click the disk and use Reactivate Disk.
• Unreadable: Microsoft says this can appear while a disk spins up. Rescan, or restart the PC with the drive connected.

Microsoft’s page also describes Remove Disk for a disk that stays missing, but only after deleting its volumes, which destroys the data on them. Don’t use it on a drive whose files you still want.

Fix 3: Give the drive a letter

A volume that shows as Healthy in Disk Management but has no drive letter won’t appear in File Explorer. This can happen when another device or a mapped network drive already uses the letter the drive had before. Microsoft’s page Change a drive letter gives these steps:

1. Open Disk Management as an administrator.
2. Right-click the volume on the external drive and select Change Drive Letter and Paths.
3. Select Add if it has no letter, or Change to replace one.
4. Select Assign the following drive letter, pick a free letter and select OK, then Yes to confirm.

Assigning a letter doesn’t change the files on the drive. Microsoft notes that the option is grayed out when the volume isn’t ready, for example when the space is unallocated, when it’s a system partition, or when you don’t have administrator rights. Changing the letter of a drive that holds installed apps can stop those apps from finding their files, so pick a letter you plan to keep. If you’d rather not use a letter, Microsoft also describes mounting a drive in an empty folder.

Fix 4: Not Initialized, Unallocated or RAW

These statuses look like an empty disk, but a drive that worked yesterday may still hold all its files. A loose connection, a damaged partition table, an unsafe removal or a failing disk can all make Windows read the drive as blank. Before you change anything:

1. Repeat Fix 1 with a different cable and port, then rescan. A flaky connection can make a disk show as Not Initialized.
2. Connect the drive to another PC, if you have one. If it opens there, the data is intact and the problem is on your PC.
3. If the files matter and the drive won’t open anywhere, try to recover them first. Our guide to free file recovery lists options; recovery software has a better chance on a drive you haven’t written anything to since the problem began.
4. If the drive clicks, grinds or keeps disconnecting, stop using it and consider a professional recovery service. Running more tools on failing hardware can make things worse.

Once the drive is new, empty or backed up, the fix depends on the status. For Not Initialized, right-click the disk, select Initialize Disk, confirm it’s the right disk and keep the default GPT partition style unless you need MBR for an older device. Microsoft notes some USB drives can’t be initialized; for those you just format and assign a letter. For Unallocated space, right-click it and select New Simple Volume. For a RAW partition, select Format. Our guide on how to reformat a hard drive explains NTFS versus exFAT if you’ll move the drive between Windows and a Mac.

Fix 5: The drive is locked with BitLocker

An external drive encrypted with BitLocker (often called BitLocker To Go) still appears in File Explorer, but with a lock on its icon, and you can’t open files until it’s unlocked. In Disk Management the partition may show as BitLocker encrypted rather than with a file system name. This section is general guidance; none of the three Microsoft pages cited here covers BitLocker.

1. Double-click the drive in File Explorer and enter its password.
2. If you don’t know the password, look for the option to enter a recovery key in the same prompt. The key is 48 digits long and may have been saved to a file, printed, or stored in a Microsoft account or a work account when the drive was encrypted.
3. Once it’s open, you can set the drive to unlock automatically on that PC from the BitLocker options for the drive.

Don’t format a locked drive to make it appear; formatting erases the encrypted data along with the lock. If the drive was encrypted on a work PC, your IT team may hold the recovery key. Our guide to BitLocker suspended explains the difference between suspending, turning off and unlocking BitLocker.

Fix 6: Device Manager and drivers

As general guidance, standard external drives work with storage drivers built into Windows, so there’s no separate driver to download for them. Device Manager can still show whether Windows has a problem with the device. Microsoft’s troubleshooting page suggests these steps:

1. Right-click Start and select Device Manager.
2. Expand Disk drives and Universal Serial Bus controllers, and look for an entry with a yellow exclamation mark. Open it to read its status and error code.
3. Right-click the drive entry, select Uninstall device, then select Action > Scan for hardware changes so Windows sets it up again.

Uninstalling the device entry removes the driver setup, not the files on the drive. If the drive shows a code such as Code 10 or Code 43, or several USB devices fail at once, the USB controller or chipset driver may be at fault; see how to update drivers in Windows 11 for safe ways to get them from Windows Update or your PC maker.

Fix 7: USB power saving

If the drive disconnects after a few minutes, or appears only after you unplug and reconnect it, a power-saving setting may be switching off the port. Windows has a USB selective suspend option in the advanced power plan settings, and Device Manager can let Windows turn off USB root hubs to save power. These are general guidance, not steps from the Microsoft pages cited here.

Our USB guide walks through turning off USB selective suspend and the hub power option step by step. Some Windows 11 PCs don’t show the selective suspend option in Power Options; in that case, check the PC maker’s power or battery app. Turn the setting back on if it makes no difference, since it helps battery life on laptops.

When the drive itself is failing

Microsoft’s troubleshooting page says that if a disk also fails on another PC, the disk is likely the problem rather than Windows. Signs of a failing drive include clicking or beeping, a drive that appears for a moment and then disappears, very slow copying, or a status that changes each time you rescan. At that point:

• Copy off whatever you can read now, starting with the files that matter most.
• Check the maker’s warranty; many offer a diagnostic tool or a replacement.
• For an enclosure, the enclosure’s USB board can fail while the disk inside is fine. Moving the disk to another enclosure or dock is a test, not a guaranteed fix, and may void a warranty.

Known issues: as of November 2026, we didn’t find a current Windows 11 problem with external drives confirmed on the official Microsoft pages we checked. If the drive stopped appearing right after a Windows update, check the Windows release health page for that update.

Related guides

• USB device not recognized in Windows 11: how to fix it
• How to reformat a hard drive in Windows 11 and 10
• Free file recovery on Windows 11 and 10: 4 ways to get deleted files back
• How to update drivers in Windows 11 (and when not to)
• BitLocker suspended: what it means and how to resume protection

Official sources

• Microsoft Learn: Troubleshoot Disk Management
• Microsoft Learn: Change a drive letter
• Microsoft Learn: Initialize new disks