i would go ahead and just get the 2 TB for 84.99. I got this one for $110 a few months back and I love it, not sure if you want this much memory though. http://www.amazon.com/Book-USB-Hard-Drive-Backup/dp/B00E3RH61W/ref=sr_1_2?s=electronics&ie=UTF8&qid=1437019449&sr=1-2&keywords=wd+external+hard+drive
http://www.amazon.com/gp/product/B00E3RH61W/ <- non-mobile