I just got AoM, and I cannot find the item transfer tab. Is there a quest later on that opens it back up, or do I have a technical issue? I’ve also rolled my game back so that GI works, if that’s pertinent.
Transfer stash tab should be in the same area of the smuggler as the base game, no quest needed. GI is up to date with the game version so don’t know why you need an earlier version of the game, but try verifying the game files.
There’s been a couple of posts about people running the game from GOG needing to uninstall and reinstall to fix a messed up stash. If your stash looks like this, might be you have the same problem: