I recently added an external, USB2.0, 120GB HD to my P4 (runnung Windows XP Home Ed.)for back-ups and music files. The internal primary drive is an 80GB drive partitioned into approx. 3 equal partitions. Also installed are a DVD and CD-RW drives. The installation went smoothly and the new drive was identified as drive H. I then made my first complete back-up of the C, D, and E partitions of the primary drive using "Backup My PC" Sometime later, I don't know when or what caused it, in Windows Explorer the external drive became identified as "Removeable Drive H" when I click on this "H" drive a message in the right hand panel of Explorer says, "insert disk in drive." I am now unable to view the contents of my external drive or add any files to it. I also have Norton SystemWorks installed and Norton's Speed Disk, System Doctor and Disk Doctor now identify the external drive as Drive "I" not Drive "H" as originally done. I am at a loss. Dwight Thornton PCBUILD's List Owners: Bob Wright<[log in to unmask]> Drew Dunn<[log in to unmask]>