Napster users can switch storage of your offline tracks from internal storage to your SD (secure digital) card.
Ensure a place for saved songs exists, or make one using a file manager.
1) Open the Napster Android app
2) Tap menu in the upper left corner
3) Tap Settings
4) Tap Advanced Settings
5) Tap Choose Music Download Location
6) Choose music location as "Internal" or "External".
Check out our Android app How-To Guide for more cool stuff.