My 5D III uses 1 Cf and 1 SD card so how do I put my SD card in the 1Dx?
Typical forum nonsense. Someone asks a question, and the first response recommends throwing money at the problem. The easy (and free!) solution is to simply drop the SD card into the CF slot. Don't worry about the slight rattling sound. Fortunately, you're going in the right direction. To get a CF card into an SD slot, you have to trim it down, so your 32 GB cards become ~10 GB.