Western Digital has their My Passport Essential 500GB USB 3.0 Portable External Hard Drive in Silver, model no. WDBKXH5000ASL-NESN, for $44.99 for a limited time. Shipping adds $2.99.

My Passport offers high capacity in a sleek portable drive. It features ultra-fast USB 3.0 connectivity; automatic, backup software; and password protection and hardware encryption to help protect your files from unauthorized use with plenty of room to store all your files.