While they may work for years, one mistake, a drop, and the files are often lost.
Both look similar so pick by price and be diligent about having a backup copy of what you can't lose on other media.
Bob
I need a portable hard drive for archival purpose. Which one is better :
1.Western Digital My Passport Essential (usb 2)
2.Transcend USB J25C (usb 2)

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic