Hide any drive on your system

1.   Go to Start > run > type “diskpart”.
2. A DOS window will appear as shown below:
   

   diskpart
3. Now type “list volume” and hit enter, the result will look as shown above…^
4. Suppose u want to hide drive E then type “select volume 3″.(without quotes).
5. Then a message will appear in same window { Volume 3 is the selected volume}
6. Now type “remove letter E”
   Now a message will come { Diskpart Removed the Drive letter }

Diskpart will remove the letter and  because of Windows XP is not having capabilty to identify the unkown volume. the bingo will happen…!!

To access the content of hidden Drive:

1. Repeat the process mentioned above but replace step 6 with following…
2. Type “assign letter E” instead “remove letter E”.

Caution:

• Never hide C:/ drive… otherwise ur system will not work

Encrypt Your Thumb Drive

n any computer you come across. With storage capacities already reaching 256 GB, today's USB sticks are often larger than yesterday's hard drives. Thanks to increased storage space and lowering prices, you can easy store nearly all your personal files on a tiny, go-anywhere USB memory stick.
There's a downside to all that cheap, easy storage, though. It means there's even more data at risk should your USB stick be lost or stolen.
Luckily, it isn't hard to encrypt the data on your USB stick so that, should misfortune snatch it away from you, at least you can rest easy knowing that your data is secure.

Encrytion on Various Platforms

Encrytion on Windows

There are a variety of Windows-based tools for creating an encrypted volume on a USB stick, but our favorite is the free, open-source FreeOTFE. FreeOTFE uses on-the-fly encryption, which means that data is automatically encrypted and decrypted without you needing to do anything other than enter a password or possess the right keyfile.
To get started, download and install FreeOTFE. Then open the application and select your USB cick on the "New" icon. FreeOTFE will then walk you through the process of setting up your encrypted volume and help you choose an encryption algorithm or set other options.
Once FreeOTFE finishes, your USB stick will contain an encrypted volume where you can store sensative data to keep it safe from prying eyes.
An alternative system is TrueCrypt, although unlike FreeOTFE, this requires you to have administrator rights to even start it on any computer you wish to use your encrypted thumb drive on.

Encryption on Mac OS X

Mac OS X actually has a nice built-in encryption tool you can use right out of the box.
To get started, just plug in your USB stick and open up Disk Utility (you'll find it in the Utilities folder inside your Applications folder).
In Disk Utility head to File >> New >> Blank Disk Image. Select your USB stick as the destination and choose one of the encryption options. You can also set the size of the volume, number of partitions and the format.
Once that's done click create and enter a good password (see our guide to picking strong passwords).
Alternativly, there is a Mac version of TrueCrypt which may be used.

Cross-Platform Encryption

For accessing data across MS Windows and Windows Mobile PDAs, the previously mentioned FreeOTFE serves as a solid open-source cross-platform option.
For use with Windows, Linux and Mac OS X machines, TrueCrypt can also be used.