Update: I managed to get it working with the answers from @Max_P@lemmy.max-p.me and this link:

https://www.zdnet.com/article/how-to-permanently-mount-a-drive-in-linux-and-why-you-should/

I've just installed Mint 22 on my laptop, and I've got two storage drives alongside my main drive. I want these drives to be available to all users on boot, and to be readable and writable. At the moment they're treated as removable drives, and are mounted under the individual user. As a result, any permissions that I'm setting as the owner are not sticking when they're mounted by another user.

The first drive is synced with my main PC through Syncthing, and is synced to Onedrive from there. The second drive is my music, podcasts, and audiobooks, which are all synced through Syncthing only. I'm the only person using the laptop and accessing any of these files, so I'm not bothered about the wrong user accidentally opening them.

I've read some posts about editing fstab to mount them at startup, but they don't cover whether the drives will be available to other users or not. Can I just add them to fstab and mount them somewhere that's available to all users, then sort out the permissions? If so, where's the best place to put them?

Thanks in advance :)