Available space and songs

[ChinoroundeYe]

I apologize if this has been previously addressed, I have searched around, but how about adding an info feature showing number of offline songs and amount of space being used by that music on your device? I'm saying because I'm pretty sure that the file format Spotify uses to download songs are not recognized by Android as audio files. I say this because when I look at available space in settings, I don't see much in the audio category when it should be GBs used up. Anyways, this would really help me out. As well as segregating offline songs from the saved songs for quicker reference.