Toshiba 400GB 2.5″ USB 2.0 Portable Hard Drive for $69.99. Remember to select free upgrade to next-business day delivery. Here is a screenshot for your reference. This portable drive does not require a separate power supply like most external hard drives. It is also smaller and lighter, making it much more convenient to carry around. Most places have it for about $89.
Originally posted earlier, this is just a friendly reminder.