My Book 2TB Hard Drive

Dell.com has a 2TB My Book Mirror Edition external hard drive on sale for $159.99 with free shipping after coupon. The drive is already on sale for a decent price--$173.99--but with coupon code FSDH6Z?TM9?SV6 the price drops. This 2TB external hard drive uses RAID 1 (or "mirroring" mode) to save a backup copy of your backed up data--excellent if you need multiple backups (because you're paranoid), or if you use your external hard drive as your primary drive, and need to back up said primary drive.