NewEgg.com has a number of portable external USB 2.0 hard drives on discount for a limited time. Deal expires February 1, 2010.

• Toshiba 500GB Liquid Blue Portable External Hard Drive, model no. HDDR500E04XL, for $84.99 (109.99 – 20 instant savings – 5 coupon) with Free Shipping. To get discount, use the coupon code: EMCYZNT42 at checkout.
• Western Digital Elements 640GB Portable Hard Drive in Midnight Black, model no. WDBAAR6400ABK-NESN, for $89.99 (129.99 – 20 instant savings – 20 coupon) with Free Shipping. To get discount, use the coupon code: EMCYZNT24 at checkout.
• Western Digital My Passport Essential SE 750GB External Hard Drive with $20 promotional gift card, model no. WDBABM7500ABK-NESN, for $129.99 (149.99 – 20 instant savings) with Free Shipping.
• Seagate FreeAgent Go 880GB External Hard Drive in Tuxedo Black, model no. ST908804FAA2E1-RK, for $129.99 (169.99 – 30 instant savings – 10 coupon) with Free Shipping. To get discount, use the coupon code: EMCYZNT39 at checkout.