HOW TO FORMAT A WRITE PROTECT USB DRIVE OR MEMORY CARD

I just came across a problem as it is mentioned above on title, so I just Google and got many results, out of which these 2 were the best: 

Primary Checks ( Only for Security )

1. Make sure the write-protection latch of your drive (if it has any) is turned off.
2. If you are using an updated antivirus, try scanning the drive for viruses.

Solutions For This:

1. By Fixing Registry

1)Just open the Run from Start menu, type regedit and hit enter.

2)Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\StorageDevicePolicies
NOTE : If this is not there, you may need to add this entry. For that download the batch file add.bat from here, and double-click the file. The entry will be added to registry.

3)Now in the right pane double-click the key Write Protect. Now set the Value Data to 0 (zero) and press OK.

4)Exit Registry and restart your PC.

2. Using Formatting Utility

As the solution suggests we will be formatting the USB drive, so backup all the items in the drive first before carrying out this step.

1)Download Apacer Formatting Utility.

2)Unzip the pack to a folder. Now double-click the Start.bat file in that folder. This will initiate the formatting. Wait until the formatting completes or the LED of the drive stops blinking. If you fail once give it few more try.

3)Now remove the pen-drive and plug it in to the PC again. Now, open RUN and type cmd and hit Enter.