Imaging a 12 GB C: Partition ( which compresses to a 7GB .tib under Normal compression ) to a new Maxtor Ext HD , spec USB 2.0 , with appropriate USB cable . Transmission speed supposedley up to 480 Mbps. Image taking 20 minutes ? My system is a new Dell 5100 3.2ghz HT. Am getting confused now re my mega-bits and mega-bytes etc. Suspect I'm imaging at 1.1 rate ? My Maxtor diags say unit working ok . Any help would be much appreciated. Thank you in advance. ken .