I'm not sure, if I understand the question...
Probably a misunderstanding of the difference between full path and relative path?
Are you talking here about a full path, which correctly would be starting with file:/// like this
file:///storage/emulated/0/Android/data/appinventor.ai_renato_bolognesi.MyAgenda_REV10/files/RENABOLO/INDX/BACKUPINDEX.txt
See also Some basics on Android storage system
So your second path would be the same, it only is a relative path?
Taifun