|Assuming you have the flash drive plugged into a USB port it can actually work with, if the data on the flash drive is damaged it may not show up in My Computer or Windows Explorer. If it shows up in Device Manager and in Disk Management, that problem can usually be fixed. |
Troubleshooting USB device problems including for flash drives, external drives, memory cards.
See Response 1:
The (logical) drive letter assigned to a drive you have plugged into a USB port is not necessarily the same every time. Windows assigns the first available drive letter alphabetically to it according to which drive letters are available at the time you plug in the drive. That drive letter is retained as long as that drive is still plugged in, but it may be different the next time you plug it in.
you plug in a flash drive, #1 - say it's assigned K
you plug in another flash drive, #2 - say it's assigned L
If you unplug flash drive #1 without unplugging flash drive #2, flash drive #2 will still be assigned L, as long as it's still plugged in when Windows is running.
If you then unplug flash drive #2 and then plug it back in again, while Windows is running, it will be assigned K, not L.