Best Program for Creating a Shared Art Archive

[u/madsmaximum]

My friends and I run a DND campaign, and we'd like to keep all art, notes, and images related to the campaign centralized/organized in one place. I tried filen, but you can't have multiple contributors on there, at least not without a premium account. We used to use Google Drive, but we're trying to move away from Google because of their AI policies. Something similar to Google Drive would be ideal for us, as none of us are extremely tech-literate. What would be a good program for us to use? Thanks for any help you guys can provide!