First of all make sure that you don't have the write-lock or write-protect switch enabled on the SDCard or USB drive.

If the above is not the case, then follow these instructions:

Solution - Clear Read Only Attribute

Hit "Windows Key+R" and enter "cmd" to enter the command prompt:

Now type the following :

After each step hit the enter key

1. type DISKPART
2. type LIST VOLUME
3. type SELECT VOLUME X (where X is the volume number you want to remove the write protect from.)
4. type ATTRIBUTES DISK CLEAR READONLY
5. type EXIT

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