how to remove write protection from pen drive

Let’s see how can you remove write protection on your portable devices like pen drives, memory cards, iPod and other USB mass storage devices.
Fix:
Write Protection on any portable USB Device can be applied by the physical lock provided on the card adjuster or some times provided on the pen drives, so make sure to make your drive not write protected by moving the lock in right direction.
But even after moving the physical lock for write protection the problem can happen due to some virus action. This happens when some virus or script which applies the registry hack to make any drive write protect when connected to the computer, In that case follow the procedure below to remove write protection from your pen drive.

1. Open Start Menu >> Run, type regedit and press Enter, this will open the registry editor.
2. Navigate to the following path:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\StorageDevicePolicies
Note: If the registry key StorageDevicePolicies key does not exist, you will need to create it
Download this batch file called add.bat from here, and double click after download the key will be automatically added to registry. Read more: http://www.troublefixers.com/remove-write-protection-on-usb-pen-drive-or-memory-card-or-ipod/#ixzz0Ihh4XYeo&C