Should've been more descriptive. Took SD card out of Coolpix A, popped it into computer to look at the photos. Also renamed one file from the DSC_XXXX to "Cloud2" or something. When SD card went back into camera, that file was invisible. Put back into computer, renamed the "Cloud2" back to DSC_XXXX format, using a random 4 digit XXXX. SD card back into camera, all good. Got confirm from Nikon, CP A only "sees" files in the DSC_XXXX format. Just got the camera, so came as a surprise to be so limited in names. No biggie. Thanks all.