Why can't I delete/create/rename files and folderd on my SD card?

I have a Note 4, Android 6.0.1. Not rooted. When I go to my files app or ES file explorer app, I csn't write on my SDcard at all. All I want to is to delete my music folder :(

from Android Forums at AndroidCentral.com - Ask a Question http://ift.tt/2cau5IR
via IFTTT