Adorama again offers the Toshiba Canvio Basics 500GB USB 3.0 Portable Hard Drive, model no. HDTB205XK3AA, for $49.95. This $20 mail-in rebate cuts it to $29.95. With free shipping, that's tied with last month's mention as the best price we've seen for a 500GB USB 3.0 hard drive. (It's a current low by $16.) It features an 8MB cache. Rebate expires March 31.