Hey Andre. Tried it, didnt work still. Even though i get a notification in thr player saying "access granted", i try to delete the track and i get the same pop up window asking for access to the sd card. Did it a second time, third and so forth, same result every time.
Been having trouble ever since i updated to marshmallow. I cannot edit the song tags or delete a track. A popup comes up asking for write permission to external storage (as my music is in my sd card), but after i go through the steps, the popup windows asks again for permission. Tried clearing the cache, reinstalling the app, even a phone factory reset. Using Poweramp on oneplus x.