step 1
ignore diskpart,fsck,chkdsk,heating up your flash drive,selling the soul to satan solutions found on the interwebs.because we are going for the kill here,thats right straight for the controller chip of your flash drive
step 2
downloading and running chipgenius while the drive is plugged in.and finding out the control chip of your drive
step 3
note the controller part number listed at the bottom and fashion the ultimate weapon available in a troubleshooters arsenel the right google search term :lol:
mine was "controller part number + manufacturer tool"
step 4
this would be a generic step because "NOT EVERY FLASH DRIVE ARE MADE THE SAME BRO" Your manufacturer tool would give you the options for scanning and fixing almost all filesystem errors,capacity misreporting,speed issues etc
step 5
gloat on how you saved your flash drive from dying a premature death