Folder wont load its content.

hi, i dj and i have a folder with all my remixes, its not something that i can find in the internet, i made them, i can find only a few that are uploaded there too. Anyway, whenever i open this folder, the mp3 wont load, the green line above takes forever to load and sometimes windows explorer stops responding, i tried copying it and pasting it somewhere else but it doesnt copy it says 0% all the...