[HowTo] RetroPie and OSMC: Retrosmc - Retrogaming on OSMC

Here is some help if you are new to the linux command line:

Basically:

Use cp to copy files to their destination:

cp /media/yourusbstick/yourfile.yourextension /home/osmc/RetroPie/roms/yoursystemname/

Edit: You can also use scp if you are connected via ssh.