Most of them are keeping their data on pen driver it is not secure anybody can view your documents. If you want to encrypt files on your flash drive in case you lose it, USB Safeguard is free software that will help you to create password protection to your pen drive.
You don’t need to install the software. Download, copy in your USB pen drive and run it. You must create a password for your pen drive when you plug in pen drive the program will ask you to enter the password. Only the people having the correct password will be able to access the files.
Every time you must remember your password, if you forget it there is no option for retrieving lost or forgotten passwords. It will run on Windows XP, Vista and Windows 7. The licence key is valid for only one USB pen drive. If you have another (or purchased a new) USB pen drive, you can get a new license key for each USB pen drive.