In my Nikon D7000 there are two memory card slots both SD. In slot number 1 at the top is the card that records my still pictures. In this slot I only ever use a 2GB card or at most a 4GB one. I know it’s probably a bit old fashioned but I am always cautious. Large memory cards hold thousands of photographs. If the card corrupts, if you lose the card or your camera gets stolen there go all your pictures.
In slot number 2, which is the lower slot I keep a 64GB SD card and this is set automatically just to record video.
If you spread your shoots across several cards your spreading the risk.