Insert the memory card to your computer and keep a backup of all the data from the memory card, because first you have to format the memory card. Now download and install Skymedi software.

After installation, the application will launch automatically show a windows with options 'Fix' and 'Cancel'. From the drop down menu, you have to browse the memory card, Once you select the location of the card, click on 'Fix', it will ask you for the confirmation, you have to click on 'Yes'. After selecting the memory card, the application will show you a size of around 955MB; this is because you have inserted a 1GB memory card.

After finishing the process, the application will ask you to unplug the memory card. Remove it and insert it again. Now the storage capacity of the memory card is increased to 2GB.
Note: If you want to check the storage of the memory card you can click on 'My computer » Memory card » Properties'. You will see that the size of the memory card is 2GB. Another way to confirm the storage capacity, re-open the Skymedi and select the location of the memory card. This time it will show 1912MB, which is 2GB.