Important changes on Android 11

Uninstalling app will DELETE all your docs

Your docs won't be stored at FastScanner folder on the phone storage anymore. They will deleted when uninstalling/re-installing app

Clear app data will DELETE all your docs

In Phone Setting > App Info > Storage, if you clear data, your docs will be deleted.

Recommendation

Back up your data before uninstalling app

Please go to Menu > Setting > Backup & Restore Data

Auto upload data to cloud storage

Set up auto upload documents to cloud storage (Dropbox, Google Drive or OneDrive).

Auto export docs to phone storage

Please go to Setting > Auto export to device memory.