I've been wary to trust the sync behavior of tools like dropbox or onedrive, as they permit concurrent edits of files. For things like encrypted password databases, there isn't an automated merge strategy that can be applied. I think they support versioning, so if two edits happened concurrently then the losing edit would be recoverable via versioning. Maybe that's not really a concern for a password database, as you'd likely be online when making a change? Anyone see issues with KeePass and sync tools?