[Zubersoft]

If you just need to import new files, it might be simpler to just use Import->Batch Import, select a cloud repository and let it ignore any duplicates. That way the instructions are simple, and MobileSheets will save the last selected folder, so it will only require a few taps. It will take longer to do this than to explicitly pick the file to import though. If you to transfer more than just new files, than using either a library backup file or the sync feature would be better. You could just synchronize every device to the same cloud folder, and you can just push changes from one device to that cloud folder when needed. That will force every device to have the same library.

Mike