1. stable performance - no load on the CPU of the PC, AC also works with old machines
2. full compatibility with all machines
3. ease of use - no need to understand, there is a code to type when you plug the thing and that's it, my grandmother could use.
4. For those who are a little more technical, it's a simple way to make an encrypted backup because your backup software sees an external device, so there is no need to integrate encryption level the app, which allows the use of inexpensive programs - or delivered free with your OS.
The only limit is that the password does just that contain numbers. But enough to secure personal data. In addition it is nice and the fact that there is a keyboard above reminds that would make use of it is encrypted.
I got one, I start to tell me that he would take a second.