Western Digital My Passport Essential 640 GB USB 2.0 Portable External Hard Drive WDBAAA6400ASL-NESN
- Automatic, continuous backup
- Password protection and 256-bit encryption
- Visual backup control center
- USB 2.0 interface
Smaller. Smarter. Safer.Our smallest portable drive ever is also our smartest with visual, automatic, continuous backup and password protection.The world’s most popular portable drive is now smaller than ever. And it’s smarter than ever with automatic, continuous backup software and password protection. Choose your favorite fun color to look smart and stylish.Our smallest portable drive ever – We’re experts in portable storage, so we designed a smaller, high-quality, integrated USB hard drive inside a stylish package. With a variety of fun colors, there’s sure to be one to suit your style.WD SmartWare – See your life safe in one place.See your backup as it happens – Seeing is believing. Visual backup displays your content in categories and shows the progress of your backup.Protect your data automatically – Relax, your data is secure. Automatic, continuous backup will instantly make a second copy whenever you add or change a file.Bring back lost fil… More >>
Western Digital My Passport Essential 640 GB USB 2.0 Portable External Hard Drive WDBAAA6400ASL-NESN

This must be a slow drive, since I can not find RPM or CACHE sizes for this disk in any advertizement or in WD’s overview or the disk’s manual.
They’re not proud of the disk speed performance, so they dont include it?
Looks and performs very well. Plenty of room and reasonably fast. The software interface is a little difficult. Can’t answer the reliability question since I did not have for enough time.
Product has a nice design a size, but I was never able to install it in my PC. It didn’t work. Finally, I had to send it back. Don’t buy it!!!
Computer won’t boot when the drive is plugged in. Lousy software. I would not recommend this drive If you are looking for something with auto back up.
This product should came with a warning regarding cable and software. I have some others WD drives and haven’t have a problem with them, so I thought I would stay with the same brand, but this is ridiculous. Proprietary cable + intrusive software. There are so many others for the same price, what a waste of time…