Digital photo, movie and music collections may have been growing over the years, but luckily hard drive capacity is keeping pace, albeit in increasingly smaller packages. Western Digital recently launched its most capacious My Passport Ultra drive yet, boasting 3TB of storage in an array of colorful shells. You can keep your files at the ready with the safety of 256-bit hardware-based data encryption and USB 3.0 transfer rates of up to 5 Gb/s. Using WD Backup, you can also set up scalable automatic backups of desktop folders and files to the portable drive or fling them to the cloud for safe keeping. WD has provided us with a trio of these devices this week so three lucky Engadget readers can try to stuff them full of data. As usual, just head on down to the Rafflecopter widget for up to three chances at winning one these 3TB My Passport Ultra drives from WD. Winners: congratulations to Kris W. of Russellville, AR; Benjamin R. of Brooklyn, NY and Saul Q. of Ansonia, CT.