How to unpartition your partitined SD card using CMD PRMT
To get your memory back as normal storage do the following steps in Windows7.
1 Press Windows-Run and type DiskPart in the ‘Open’ box.
2 This will bring up a DOS box with DiskPart running in it.
3 Type ‘list disk’ and look for the disk that resembles your SD card. (For this tutorial, we’ll assume it’s Disk 1)
4 Type ‘select disk 1′(Select SD card)
BE REALLY SURE YOU WANT TO WIPE THE CARD.
5 Type ‘clean’. This resets the disk.
6 Type ‘create partition primary’
7 Type ‘exit’ to quit.
8 Once you have done every thing format your SD-CARD using right-click inside My Computer
You will find the image in the attachment.