After 55 years and about six different p.c's I have finally made the switch to an iMac and I must say I am pretty impressed. I have a 27 inch 2.7Ghz with 12 GB of ram and a 1TB hard drive. The main reason that I finally made the switch is that I would like to convert my old family videos from VHS and Sony digital 8mm to dvd. I have also purchased the Elgato video capture device for the VHS transfer as it seems to be pretty highly regarded for its ease of use and performance. I am now in the process of trying to determine what type of external hard drive would serve me well for backup.The two models that I have been looking at are both Western Digital drives one is a 2Tb My Book Essential at 119.99 and the other is a 3Tb My Book Essential for 139.99 (WDBAAG002OHCH-NESN, WDBAAG0030HCH-NESN). I would think that I would be better off with the 3Tb but I am unsure about these drives connections usb 2.0 versus other models which have usb and firewire capability.I have searched the forums and I realize brands of drives are like brands of cars. I just need some basic help to determine if these will work or reasoning on why I should consider others. Thanks, Jim