You'll need to know what the drive is called to mount it. To do that fire off:

sudo fdisk -l

You're looking for a partition that should look something like: /dev/sdb1. Remember what it's called.

Create a new directory in /media so you can mount the drive onto the filesystem:

sudo  mkdir /media/usb

sudo mount /dev/sdb1 /media/usb

When you're done, just fire off:

sudo umount /media/usb

[참고사이트]

How to access a usb flash drive from the terminal? (How can I mount a flash drive manually?)

Homelab