I bought a D600 on Saturday. I've taken about 50 pictures with it and uploaded them using an SD card reader/writer through Nikon Transfer/ViewNX2 without any problems. Last night I uploaded pictures off the camera in 2 sets, and the software isn't recognizing the images from one of those sets. I don't remember the exact sequence of events. I had some trouble with the automatic upload from the 1st sequence (I think), and that is the set that I can't see. I can't launch the picture utility in View NX 2 or import them into Lightroom. The message in View NX 2 says "an invalid file has been selected. Only NEF images taken from a Nikon camera may be viewed." The jpg preview is there, but not the nef file. I called Nikon support and he said it is the SD card. But I don't see anything in the manual that says the SD card is not supported in the D600. This is the SD card, purchased in July: http://www.bhphotovideo.com/c/product/828325-REG/SanDisk_SDSDRX3_016G_A21_16GB_SDHC_Memory_Card.html I think it has something to do with Nikon Trasfer or View NX2. Nikon support told me to update View NX 2, and I did, but I still can't access the nef files. Any suggestions?