Originally posted by hongzhibin1987 +1 with Lensbeginner.
check your sd card first.
...mainly because it's easier to replace!
If you get the same fault with another SD then I'm afraid you should consider sending the camera for repair...
To speed up the process, set the SD slots for mirroring and test two cards at once.
If you get faults in a card, invert them.
If you get faults in the same card, it's the card, otherwise it's the slot.
If you get fault in both at the same time, I believe it's gonna be the camera.