According to support, they cannot make my esi file accessible to another device. Bummer.

"Since you are able to save the esi.Backup file on an external SD card, it is not actually possible to run the backup file to a different device. That is the reason why you’re getting an error that the file belongs to another device, the files save in your SD card are the files from the device that is capable of reading the same file system."

I suggest anyone who makes important notes not only back up (for possible recovery on the same device) but also email yourself a PDF copy of your important journal notes.