Amazon offers the Silicon Power 1TB Rugged Armor A30 Portable USB 3.0 External Hard Drive, model no. SP010TBPHDA30S3K, for $54.65 with free shipping. That's $5 under our mention from last month and the lowest total price we've seen. (It's a low today by $3.) This model passed the US military drop test (MIL-STD-810G).