Hi, I am Dave, I will help you with this.
Try plugging that flash drive into another PC and check to see if it works.
If that USB flash drive does not work on another PC, there are many unrecoverable errors we get on flash drives.
You will find 'fixes' all over the Internet, none of them work, sadly the drive cannot be repaired
It would be best to return that flash drive under warranty and get a free replacement.