Changing storage disk on QNAP TS251+


I have a QNAP TS251+ which contains two disks (both 3tb). One disk which holds music files/RoonServer is nearly full (It also contains all my Plex movies), the other disc is empty.

I’d like to migrate the music files and all Roon related stuff to the other, empty volume, so as to free up more space for Roon and music.

Does anyone know the best strategy for doing this? Is it a fairly simple process?

Thanks for any advice,