How do I unlock my sandisk cruzer 8 Gb if I lost the password key for my pen drive ?

SOURCE: forgot my password on my sandisk u3 cruzer 4.0gb

PASSWORD

SOURCE: How format SanDisk cruzer Micro 8GB

copy the files to you're pc, and if you use windows just go in my computer and right click on the flash disk icon and click format check the quick format box and the press format.

SOURCE: My computer do not recognized my Sandisk Cruzer Micro 1.0 GB.

I had the same exact problem on my 8G card. It worked fine in the camera, but when I plugged it into the card reader it flashed once and then the light went off. So, I put the card back in the camera and ran a USB cable from my camera (there was a port on the side of my Cannon Powershot that was smaller than a USB, but I don't know what to call it) to my computer. When I turned the camera power on, the computer was able to read the 8G card while it was inside the camera. I downloaded everything to my computer at that point. Hope this helps! I got the chord from my external hard drive and that fit from the camera to the computer.

SOURCE: how to set up a password for sandisk cruzer 4gb

You could try using TrueCrypt.