ay hindi ganto yan.
try this baka gumana, hindi ko na paliwanag ng maayos sorry ;)
1,Parts Manage
2,Format this part.
3,Re-Partitioning, partition 2 or 3 partition.
4,Go to my computer and if you see the partition of usb flash drive is re-partition and go to step 5.
5,and try to format manual...