Best Buy.com has 4TB WD Easystore Portable USB 3.0 Hard Drive (WDBKUZ0040BBK-WESN) on sale for $109.99 - $15 w/ unique emailed EDU promo code (you may enroll here for future EDU promotional codes free, .edu address is not required) = $94.99. Shipping is free or select free store pickup where available.
http://www.bestbuy.com/site/wd-easystore-4tb-external-usb-3-0-portable-hard-drive-black/5792405.p
http://www.bestbuy.com/site/wd-easystore-4tb-external-usb-3-0-portable-hard-drive-black/5792405.p