At the moment, you can't transfer resources between campaigns owned by two different people. As a mentor, you have access to the transmogrify feature, though, so you can transfer resources between your own campaigns ( <a href="https://wiki.roll20.net/Transmogrifier" rel="nofollow">https://wiki.roll20.net/Transmogrifier</a>) . That can save some of the hassle of having to redo character sheets and the like. If you've created some resources that you wholly own the rights to, such as maps, tokens, tiles, or the like, you could consider offering them through the Roll20 marketplace ( <a href="https://marketplace.roll20.net/home/becomecreator" rel="nofollow">https://marketplace.roll20.net/home/becomecreator</a> ).