As one of its daily deals, Best Buy offers the Western Digital 500GB My Passport 2.5" Portable USB 3.0 External Hard Drive in Blue, model no. WDBKXH5000ABL-NESN, for $49.99 with free shipping ($0.10/GB). That's $20 under our August mention and the lowest total price we could find by $20. Sales tax is added where applicable. It features automatic, continuous backup and password protection. Deal ends today.