afaik you can only transfer the state if you do a backup and don't use the device afterwards? Otherwise you have an outdated state?
Discussion
You can use the device, but not SimpleX. I think.
nostr:npub1hstt359n26ru3w0f9lcp03p6v89hamav9gq7vgq0ydyph5utjyysmcmk07 are you on here? Do you know?
You have to stop the server going, because if you tried to use the same database on two different machines, it would screw up encryption keys and order of messages.