[Zubersoft]

One of the things Android added in more recent OS versions is the ability to use an SD card for the internal storage, which Google calls adaptable storage (https://fossbytes.com/android-sd-card-in...e-storage/). Did you adopt the SD card as the internal storage on that device? If so, you have to undo that and just use the regular device's internal storage. That is something you have to do in the main tablet settings, not in MobileSheets. Also, I would recommend using a subdirectory under /storage/emulated/0 - otherwise you are going to wind up with a mess of folders at the root of the storage as your library grows.

Mike