Identify disk

check the boot name:

sudo fdisk –l

From the screen identify the attached drive (here '/dev/sda1')

Mount disk

Create a folder to mount in:

sudo mkdir -p /nmt/usb
sudo chmod 775 /nmt/sub

Mount disk:

sudo mpount /dev/sda /nmt/usb

Goto /nmt/usb to see content of mounted disk.

Automount disk:

Edit fil /etc/fstab

sudo nano /etc/fstab

Insert new line before last:

/dev/sda1 /nmt/usb vfat defaults 0 0