Hi and welcome to LQ
You need to mount the drive. When I want to manually mount my pendrive, I type in
#mount /dev/sda1 /pendrive
You will need to do something similar:
#mount /dev/sda1 /mnt/pendrive
Note the '#' symbol, this means that you need to be root to do these things - use 'su' to become root.
And this is moved to Linux-Newbie as it's not an introduction.