At DrivePop, purchase the DrivePop Unlimited 1-Machine Lifetime Backup for $89.99 and receive Unlimited Lifetime Backup on a second machine for free. That's the best deal we've seen for a multi-machine backup plan from DrivePop since Black Friday. It features unlimited backup space, unthrottled bandwidth, "military grade" AES-256 encryption, and online streaming of music and movies.

Of note, DrivePop also offers Unlimited Lifetime Backup on 1 additional machine with the purchase of its DrivePop Unlimited 5-Machine Lifetime Backup for $119.99, or its DrivePop Ultimate Plan Unlimited Lifetime Backup for $149.99.