I bought this to supplement the BEFS BIO USB. Since I deal with a lot of sensitive files that need to be transported securely, I use the BIO USB primarily but use the E-USB for when I need to give the USB to my associates. The encryption enables security since it'll be harder to crack the password should I or my associates lose the flash drive.
I uploaded this video to show how it works for those who are new to high security flash drives. https://www.youtube.com/watch?v=4jr64dTfi8o
This works great to keep files safe. It's cheaper than the BIO USB that BEFS also sells. Keeps your files secure so that it can only be viewed with the proper password. If you want the ultimate security, get the BIO USB since that uses your fingerprint to unlock it. It's also available at walmart but is more costly.