# USB not recognized after installing OS X Snow Leopard on it

disk-utilityhard drivesnow leopardusb

A while back, I tried installing OS X Snow Leopard on a USB Thumb Drive (64GB) in order to see whether it could run on a Mac with a broken HD. It worked, but was obviously incredibly slow (I didn't have an external hard drive to test with at the time).

Now I have the Mac fixed, but I'm having problems with the USB. It still has MacOS on it, but I want to erase it.

Here's what I tried on macOS High Sierra:
Disk Utility -> Select the drive (grayed out) -> Erase: Gives error "Cannot write to last block of device"

On Windows:
Command Prompt:

diskpart
list disk
select disk 1
clean
Error: Request could not be completed because of an I/O error.


On Ubuntu:
GParted -> Select my disk -> Delete MacOS X partition

Gives error: Error fsyncing/closing /dev/sdb: Input/output error

This might not be the right forum to ask about this, but I figured it was caused by OS X, so I put it on here. I anyone has a suggestion of a better forum to go to, please tell me.

Does anyone have any idea how I might fix the USB Drive?