You’re right, there should be a second slot present. But again, the amount of drive space isn’t really the issue; I just happen to have this perfectly fine additional 1TB drive at hand, so I thought I might as well use it for secondary storage, and there’s some data on it I still want access to.
Right now, it looks like either doing something like that as a on-off, or chucking it into an external case of some sort for infrequently used ‘cold storage’ might be my best bet.
I don’t have an ImgBB account—never needed one for my infrequent uploads before. Also, I tried on devices which don’t have any connection to my google profile and whatnot (work PC), from private tabs, from behind a VPN, and none of those presented an issue. Plus, several people can see the pictures. I’ve opened a test thread in ATMB to find out what’s going on.