Newegg’s got a pretty fair deal on an external 1TB hard drive at $74.99 with free shipping and after a $25 mail-in rebate. You’ll have to purchase the drive by this Saturday, the 13th, and send the rebate form back within a month.
The drive is pre-formatted for Mac computers, but a quick NTFS formatting (maybe not so quick) will make it Windows-friendly. It actually comes formatted as a FAT32 drive, so you could use it on a PC like that if you’re so inclined. Up to you.
The drive itself is a Hitachi 7200RPM 1TB external hard drive with a USB 2.0 connection.