IMPORTANT – The first thing to consider:
1. Remember to be logged in as root user to carry out the formatting, otherwise must use the sudo command to activate access. For my part I’ll use the sudo command in this tutorial for easy understanding by novice users.
$ fdisk -l
It will show all your harddisk partions and usb partitions and their device name.
2. The unit must be dismantled. In most of the distributions can be done by clicking on the secondary drive icon and choose “Unmount the unit.”
3. Must be careful to format the drive correctly, but can cause damage to other units such as hard disk for example.
As a first step-and-only open a terminal window and use the mkfs command with the following syntax:
$ sudo mkfs.vfat /dev/sdxx
Where /dev/sdxx is the path of the USB device to be formatted.