Switching from a Pi to MiniPC

Hi all, new here and new to proxmox too. I have been using a Pi for awhile now with CasaOS on it. Just ruinning AudiobookShelf and a qBitTorrent mostly. I am switching now but unsure how I am to get my hard drive with all my content recognised and able to be used by CasaOS and other containers I might fire up. I have plugged them in as they are USB and I believe they are showing up within

I am not sure what to do beyond this point. Would really like some help if possible.
Thank you, and thank you for the videos you made that got me to this point.