Format your USB Flash Drive

Format your USB Flash Drive to use a Single Partition:

1. Open a terminal and type sudo su
2. Type fdisk -l (and note which device is your USB Drive)
3. Type fdisk /dev/sdx (replacing x with your actual usb device)
4. Type d (to delete the existing partition)
5. Type n (to create a new partition)
6. Type p (for primary partition)
7. Type 1 (to create the first partition)
8. Press Enter (to use the first cylinder)
9. Press Enter again (to use the default value as the last cylinder)
10. Type a (for active)
11. Type 1 (to mark the first partition active "bootable")
12. Type w (to write the changes and close fdisk)

II. Create a Fat32 Filesystem on the USB Flash Drive:

1. Type umount /dev/sdx1 (to unmount the mounted partition)
2. Type mkfs.vfat -F 32 -n MULTIBOOT /dev/sdx1 (to format the partition as fat32)