Western Digital via Facebook offers the Western Digital My Passport 320GB USB 3.0 External Hard Drive, model no. WDBKXH3200ABK-NESN, for $44.99 with free shipping via the instructions below. At $0.14/GB, that's $5 under the cost of buying it directly from Western Digital and the lowest total price we could find by $12. It features maximum data transfer rate of 5Gb/s and backward compatibility with USB 2.0. To get this deal:

1. Click here to view the offer on Facebook
2. click "Get Offer" and enter your email address
3. you'll receive a code via email, which you can use when buying the hard drive here