Icons/picture in folders

Hi, I am at present copying all my large collectio of music from my WD  500 external drive to My Digital Live.

Questions,Why can’t I retain the folder icon, when I go into folder properties I don’t get the option to change, I did with my old hd.   (2) My music  picture files in the folders keep disappearing and I have to keep exiting and entering to bring them back    (3)  Is it usual for a large folder to take a long time to open and show the music files?

I have just bought this hd…and to be honest not happy with it (at the moment)

Everything sounds normal in here o.o