Memory sticks, also known as flash drives, are devices that can hold a considerable amount of data. Therefore, encrypting your memory stick to make it more secure is an important security procedure that you should undertake in order to prevent your data from falling into the wrong hands. If you want to encrypt your memory stick, do so via BitLocker, which is a built-in encryption tool found in Windows 7.
Insert the memory stick that you want to encrypt into a USB port on your computer.
Click "Start," then click "Computer" to open Windows Explorer.
Right-click the icon of the memory stick and select the option labelled "Turn on BitLocker."
Check the box next to "Use a Password to Unlock the Drive." Enter a password into the "Type your Password" field and enter it again into the "Retype your Password" field. You must use this password when accessing the memory stick again. Click "Next" to continue.
Save and print the BitLocker Drive Encryption 48-digit recovery key by clicking on the appropriate option. Use the recovery key to access your memory stick in case you forget your password. Click "Next" to continue.
Encrypt your memory stick by clicking on the button labelled "Start Encrypting."
Click the button labelled "Close" after encrypting the memory stick to exit the BitLocker Drive Encryption Wizard.