How to convert 2gb sd card into 4gb

How to convert 1 or 2GB memory stick into 4GB?
Just follow the simple instructions:
Step1: Insert your memory stick in USB port
Step 2: Open the Drive increaser software folder (download the software)
Step 3: Rename the Pendrive or memorystick

Step 4: Open Drive Increaser 2 icon from the Downloaded folder.

Step 5: The opened file is asks USB drive Name. (Before enter the name first Rename the Memory stick or Pen drive). Just enter the renamed pen drive name. Ex: 2341

Step 6: After that, it will ask USB pendrive letter (Ex: H or I or J). Repeat this two times

Step 7: After Drive letter entry some process will be done with Red color like this image

Step 8: Finally it shows Done how to convert 2gb sd card into 4gb - image_thumb%25255b56%25255d.png?imgmax=800f="http://lh4.ggpht.com/-XyB56Sumxhc/TwnfINnKnCI/AAAAAAAAAqo/Q-RRos2M-x4/image%25255B35%25255D.png?imgmax=800">

How to recover sd card if i have converted it into 4gb from 2 gb

It will work but can only capacities it original size

I am not aware of any method of doubling the capacity of any memory card except by using compression software and even then the gain in capacity will very much depend on what type of files are being saved to the memory card, i.e. some files like JPEG images are already highly compressed whereas other files such as Text or Documents may compress well.