<p>I hate when folks don't come back with the "after", so here it is.<br>
This started out as an OMG moment, as a card that just got formatted died. I realized by the number of images on the top of the camera that something was way off, and the reality was that the card wasn't being read at all! Thus, the purchase, as advised, was two identical pro san disc cards (64 gig). The slot was backup, and I had no issues (yes to the official shooter question) writing to two Raw cards. It's truly amazing what today's technology can do!<br>
The number at the top at the beginning said I had 1,200 images available, which seemed low. I am still processing / downloading, but I think I shot about 1,000, and my number was still 465 when I stopped. So, something's up with the calculation which can lead to panic. <br>
All's well though! Thanks!</p>