Downloaded music gone after uninstalling Spotify

[Sissemie]

So,since installing Spotify Premium, I've been coping with some storage issues on my internal storage (HTC M8).

My first move was to move all my downloaded content to my SD card, but the problem stayed. It said no free space while I just moved 4GB to my SD card. Strange. Next move, uninstall Spotify to get rid of all data on my phone completely.

Turns out Spotify is gone but I still have the music somewhere on my phone, can someone help me retrieve it?