Chosen Solution
I have a Canon EOS Rebel T3 and I keep getting the error: Card’s write protect switch is set to lock. I have bought a new SD card and there is no lock on anything. Any information to repair this would be greatly appreciated. Thank you in advance.
There is a sensor inside the SD card slot. Which detects the card lock on the side of the card. Something may be blocking the sensor, it’s dirty or it’s damaged. I was googling and it appears others have had the same problem even after replacing the card slot internally
