Hi, I am currently using v3.0.4-prodp and backup is also not working for me. But when I do it, I don’t get any error, but the restore is way too fast with the wrong animation, so it does not restore anything. I am not sure, but about 2 versions back (Release OnlyKey 3.0.2 Firmware · trustcrypto/OnlyKey-Firmware · GitHub), this thing (backup/restore) worked. I think the changes in recent releases broke this functionality.
Also, the size of my working backup is not the same as the new one.
I have a normal onlykey, and I tried to do a backup on it and it worked the backup verification was fine not corrupted.
I tried to wipe the Onlykey Duo and restore to the Onlykey backup file, using the same backup phrase.
They both have the same number and version in the Keepass, however Google and Keepass refuses to open with the Onlykey Duo.
Is this a error in this firmware version or I can not use a Onlykey Duo as a replace for the Onlykey?
Backup says that it is not corrupted on mine (OnlyKey Duo) too (v3.0.4). That (proper backup of the resident key) was fixed in 3.0.2 version (read notes in releases) and I can confirm that when I backup/restored using that version it did indeed properly restored on my second OnlyKey Duo (with resident key and all the rest). I have unfortunately not bothered to try to downgrade from the current 3.0.4 version.