The first thing you should do here is to reconnect the drive. If it’s still missing from the page, then troubleshooting begins. The Device Manager can say that the connected device is working properly and healthy. However, you see that the drive is also unallocated. Data can’t be written to unallocated space on your hard drive. Several things can cause the unallocated hard drive issue, but before figuring out the cause, you need to learn how to fix an unallocated hard drive without losing data.
How do I fix unallocated hard drive without losing data in Windows 10?
1. Use Command Prompt
Create a new volume using commands
At this point, DiskPart should create a new volume. Note: In case the above-mentioned steps fail, follow the steps described below to create the volume manually.
Create a new volume manually
2. Use CHKDSK
Note: In the command above, remember to change z to the correct drive letter of the unallocated hard drive. /f repairs drive errors, /r recovers data in bad sectors, and /x unmounts the drive to begin the process.
3. Update your hard-drive driver
If you still don’t see your drive after the reboot, return to these steps and start all over. In Step 4, select Uninstall instead of Update Driver Software. After restarting this time around, your driver will be re-installed. This is another useful tip when learning how to fix an unallocated hard drive without losing data in Windows 10.
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