Solved I am having a problem with a shared folder

Hi I am having a problem with a shared folder, I have 4 computers all running Windows 7 Ultimate 64. They are all network (homegroup) (wirelessly) and everything is fine, but I have just connected a 4 Terabyte external USB drive to my main office computer that contains 2 main folder the first folder is named MUSIC with 1000’s of sub folders & files the second folder is named MOVIE DRIVE R with...