How do I un-hide Googles cache for Google Music?

[AC Question]

and change permissions for android to save that cache on my external in Lollipop? my sdcard is full, and i am trying to make it so i can use my google music on other media players, along with having google play know where to look for its cache on my external?!?!? So can someone help me out???? I know this might be a slightly difficult challange, but trust me, im up for a challenge!!!!
Thanx

Brock

 

[B. Diddy]

Moved to General Help (was in Google Home forum before, which is intended for smart home discussions).