I gave my daughter a D3100 for Christmas along with a SanDisk 16Gb card. I also bought a Lexar SDHD 32Gb Pro Card for it. When I first put the Lexar card into the camera, it seemed to work ok. We took the card out and put it into her Mac. Capture NX2 was not opening her RAW files (I didnt remember the posts about needing to upgrade to the most recent verison of NX2). I put the card back into the camera and the green transfer light on the camera came on and stayed on with the hour glass in the LED window. I tried a few things and, at one point, got a message that the card would not work with the camera. I went to Nikons web site and the Pro card was listed as a card that works so I took the card out of the camera and put it into a Cannon point and shoot. It worked in the Cannon so I reformatted the card in the Cannon and put it back into the D3100. It worked so I reformatted it again in the Nikon and took some pictures. It seemed fine. I took the card out and again put it into her Mac. It seemed to work fine but when I put it back into the D3100 the whole thing started againgreen transfer light staying on, hour glass in LED. As she was going off to France for her semester abroad, I sent her with the SanDisk card and I kept the Lexar card. Has anyone else have this problem? I have not contacted Lexar yet but I will and I would like to be able to tell them if others have been able to use this card. Thanks for your help.
>Macs add additional directories and files when accessing >media that resembles the PC file system.
Thanks for the this information. What is the solution? I have always been told not to use the computer to re-format a memory card. When I put the card into the camera after transferring the images, it effectively stalled the camera so that I could not format it, or do anything else with it for that matter. Should she format the card using her Mac or will that add even more files and directories that will interfere with the D3100 using it?