Originally posted by us271934:

When I switch computers I stick the users/'user name'/AppData/LocalLow/IronGate/Valheim folder with my game save on a thumb drive and transfer it that way. I guess I don't quite trust cloud reliability. So far so good. It's also handy as a backup if the data gets corrupted.

Yeah, I started to do that after the first time I lost my upgrades. It was a little irritating, but worked. But, well, if I don't remember to work my way all the way back into that folder every time and copy the files, it's very frustrating to lose a bunch of upgrades. :-(

And if I actually forget which system I was last on... *poof*