Duplicate files showing up & micro sd permission

Anyone else experience having duplicate files showing up on stock file manager's home tab and stock music app? I tried deleting both application's data and cache, no progress. It's pretty harmless but it's annoying to see a lot of thumbnails for the same files.

Also, sd card is read only? I can't seem to transfer files via ftp (except for es file explorer which is a known chinese botnet) directly to the micro sd. Any help? Please and thanks.