New
#1
Backup using File History files can't be deleted from USB drive
My new 256 GB Sandisk Ultra 3.0 USB thumb drive originally showed up in Disk Manager with a main partition of around 248 GB and a system partition of around 200 MB.
I briefly used it in my Win10PC as a backup drive (Back up using File History).
I later went back in and designated a different (non-USB) drive as the target for “Back up using File History”.
But this did not remove 15 GB worth of old backup files from the thumb drive, and when I tried to erase them, permissions were denied. I looked and looked for a way to adjust permissions in order to get rid of them, without success, so I reformatted the thumb drive.
But now the thumb drive only has 233 GB free space. In Disk Manager it has a 200MB healthy EFI System Partition, and a 233GB NTFS Healthy (Basic Data Partition).
This suggests that around 15GB worth of backup files are still there, but now they are totally invisible and inaccessible.
Is there any way to get this thumb drive back to its original, larger capacity?
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(Windows 10 Pro ver 20H2 (OS build 19042.867)