HOW TO FORMAT USB USING CMD
1. go to start menu or run
2. type "cmd"
3. then type "diskpart"
4. type "list disk" (choose your usb correctly you dont want to mess your hard drive)
5. type "select disk 2″ or 3 for example( the one with a size of 32,16,8,4 or 2 GB)
6. type "clean"
7. type "create partition primary"
8. type "select partition 1″
9. type "active"
10. type "format fs=fat32 quick"(wait until it formated)
11. then type "assign"
12. finish and exit