Please share the file with mike@zubersoft.com. You will need to upload it to a cloud service like Dropbox/Google Drive/OneDrive first and just share a link to the file with me. I will take a look at the file and if there is an error, I will repair the file if possible so that it works with the latest version.
Having said that, if you can just update your old device to the latest version of MobileSheets, and then create the backup file, that may also resolve the issue. Is there a reason you haven't updated the old device to 3.8.21? Do you assistance with that?
Mike
Having said that, if you can just update your old device to the latest version of MobileSheets, and then create the backup file, that may also resolve the issue. Is there a reason you haven't updated the old device to 3.8.21? Do you assistance with that?
Mike