There are four simple ways to help you achieve the goal. If the flash drive has bad sectors or been damaged, you may scan the damaged sectors and fix it. You may need to know the difference between FAT32 and NTFS file system. That is to solve the files system issue or unallocated space issue. Typically, you’ll need to reformat the USB flash drive to regain the full capacity. How to quick restore USB flash drive back to full capacity accordingly However, if you have other purposes for this stick, try following ways to restore USB drive back to full capacity on Windows. If you still need that type of USB drive, please keep it in this status.
If the USB flash drive is used as WinPE or installation or other types of bootable media, the capacity may be affected by the bootable file’s size. Learning the reasons would help you better understand the close following solutions. The following are the common causes of this problem. Possible reasons for flash drive showing wrong capacity on Windows However, some of these users find that the USB drive does not show the full capacity in Windows 10 and it seriously affects the usage, as aforementioned user.