I too have this problem with only 1 of my 4 cameras. If I format the card in the odd camera, at the end of the format, it says only .94 percent storage available. When I use my PC to format the card it works fine, and I am able to copy many files to the SD. When I reformat the SD and return it to the camera, it immediately says only .94 percent storage available. If I take this card to another camera, it works fine and shows all available storage (files with Record and Log). If I reformat the card in the good camera, all is well and works perfectly. But return the SD back to odd camera same .94 percent available and only Alert recording??? Software is current.
More details, looks like the SD card is at fault. Unpredictable operation!