Mount USB

List devices:

sudo fdisk -l

Create mountpoint:

sudo mkdir /media/external

Mount:

sudo mount -t vfat /dev/sdc1 /media/external -o uid=1000,gid=100,utf8,dmask=027,fmask=137
sudo mount -t ntfs-3g /dev/sdb1 /media/external

Unmount:

sudo umount /media/external