How to get mp3 files from Saavn app?

I am using Saavn for listening to and downloading music. The problem is that the app downloads all of its data to my internal storage. I have only 8GB of storage in which only 5.23GB is user usable. Now the cache size of Saavn is more than 2GB. I don't have space to install new apps but I don't want to delete the songs. I tried to move the mp3 files. I navigated to the Android > Data > com.saavn > songs folder and found mp3 files whose names are random 10+ digit numbers. When I try to play these files My music players is unable to play them. I even tried other apps like N7 Music Player. Is there any way by which I can either extract the mp3 files or I can change the storage to SD card? I see no option for this in Saavn.