You can use your PC and a USB cable to copy the file to and from the internal storage. The PasswdSafe file chooser should see it if you enable internal storage using a menu option.
sync: PasswdSafe Sync 3.13.1
sync: box: Override auth activity to enable DOM storage
lib,passwdsafe: Remove manual calls to garbage collection
passwdsafe: PasswdSafeEditRecordFragment: Move auth code to dialog
passwdsafe: Validate TOTP time start
passwdsafe: file: Totp: Add known-invalid num digits and time step constants
passwdsafe: file: Totp: Use long for time step