Problem with the size of my download

[tetcarp2001]

Hi,

I've got a One Plus 5t, and I'm subscribed to Spotify. I found on the setting that we can change the qyaliquof our download. I read that use more stockage in my phone, but ... it's using too much place on my phone and I want to go back ! How can I do to have my music like before please ! 

(Before the operation I had 30% of stocksge in my phone now I've got only 5%) 

Sorry for the mistakes, I'm french 😅,

Thank you very much.