For example, If you want to change keyboard layout to Japanese keyboard layout.

with this command ->

$sudo loadkeys jp

$sudo setxkbmap jp

Use below command to format usb drive (/dev/sdxy) to be VFAT file system.
#mkfs.vfat /dev/sdxy

Move to your target directory and execute this command

# du -la | sort -n

# echo $?

echo the last result of executed command.
0= ok, else error