Till date I have used several types of SDHC cards, mostly Sandisk, with my Nikon D40. Hoever, whenever I insert the newly bought SanDisk Extreme Pro 64 GB card into my camera, it says " Card not identified. Format the card". Even after formatting, it shows nothing. Also, at most times, it does not even insert properly in the camera slot, and seems to get stuck, and I have to keep pressing before it releases from the slot.
My question is, are SanDisk Extreme Pro cards compatible with Nikon D40 cameras or not?
I am about to buy a D5300 soon, could I use my SD card with that camera, or do you think that the card I bought is not genuine or actually defective?