As part of my prep to host Gloomhaven games, I have been uploading a lot of assets. As I individually upload them, they show up in the "Recent Uploads" category of "My Library". After uploading a group I then move them to a folder. Some of the time the items remain in the "Recent Uploads", though, even after I've renamed them in a folder. To compound my confusion, I've created Decks where when I login the next day the images are displayed as broken links for the cards. My question is, what is the proper and safe way to upload many images? I have not been diligent on saving local copies, which I'm afraid will come back to haunt me (if I don't pass my saving throw).