I HAVE AN EXTERNAL HDD THAT WAS RUN ON VISTA FOR YEARS, IS CURRENTLY ATTACHED & INDEXED IN MY NEW WIN 7 COMPUTER? IS COMP READING THE BACK UP FILE OR IS THE ACTUAL FILE EXISTING TUCKED AWAY SOMEWHERE. AFRAID TO DELETE AND SYSTEM INFORMS ANOTHER BACK UP IS DUE BUT NEEDS AROUND 430+/-GB OF SPACE...i DONT HAVE THAT MUCH ON A SINGLE DRIVE BESIDES C: (666GB FREE/1TB) D2GB/16GB) G68/750GB) H89GB/1TB) N165/500GB) MAYBE TOO MUCH INFO BUT WOULD LOVE TO GET RID OF THOSE NOTIFICATIONS AND HAVE MORE DISK SPACE. LIKE I SAID 100\'S OF BACKUP SET ALL CONTAIN MY MUSIC ETC.