I did this exact thing when contemplating getting a mini pc. I got an external drive and turned my Deck into a Kodi box. It’s been great, though it had trouble pushing 4K60, so I have it set up to output 1080. If you’re setting up something like Kodi it’s worth mentioning that the Deck uses KDE, so you can set window rules to always open the application fullscreen.
I did this exact thing when contemplating getting a mini pc. I got an external drive and turned my Deck into a Kodi box. It’s been great, though it had trouble pushing 4K60, so I have it set up to output 1080. If you’re setting up something like Kodi it’s worth mentioning that the Deck uses KDE, so you can set window rules to always open the application fullscreen.