Reallocate unallocated space in sd card

Sometimes we face the problem of some unallocated space in our memory card especially while using it as some operating system with Raspberry Pi or while using it to store O.S in it.

Note that this method will delete all your data in the card but will reallocate the total space.

This method is only for Windows operating system.

Steps to be used:

1. Check if the memory card inserted really has unallocated space or not- To do so, 
• Press the Windows button+R, this opens up the command prompt
• type, diskmgmt.msc and hit enter.
2. Check if the drive which is your memory card, has unallocated space or not. ( If it has, it will show, in rectangular boxes beside the allocated space.
3. Type diskpart in command prompt and hit enter.
4. This will open up another command prompt with DISKPART> written
5. Type list disk  to list all the disks present in the system along with their sizes.
6. Select the desired disk,type select disk 1  if your memory card is at position 1.
7. Now type clean on it to clean all the configuration on the disk.
8. Now to reallocate the memory type, create partition primary and hit enter.

Now your memory card is ready to be used as new.

Hope your problem is solved....... :)