Nikon Coolpix 5900/4 GB Kingston SD Card

Correct. The 5200 works with SD cards, 2GB or smaller. It will not work with higher-capacity SDHC cards.

The Coolpix L110 can work with SD and SDHC cards up to 32 GB. If you bought a SDXC card, it won't work in your camera. I don't think Nikon will come with an update of the firmware, only for bigger memory cards, because you can shoot hundreds of pictures already on a 32 GB card. Also be sure the Lock switch on the side of the card is in the unlock position. Like the 64GB card on the picture.

The L105 works with SD cards. Make sure you're not using an SDHC card. You need to use SD cards, 2GB and smaller.

The SD card maybe faulty, try a different SD card.

Try switching the button back and forth located on one side of the card several times to unlock the the sd card, sometimes switch contacts become dirty.

There are no 4GB SD cards. "SD" cards larger than about 1GB are actually SDHC cards. SD and SDHC cards fit the same slots, but they are slightly different electrically. Many cameras won't work with SDHC (high capacity) cards. SDHC is not backwards compatible.

Your camera will accept a maximum SD card capacity of 1GB. It simply isn't capable of handling anything of a larger capacity and in particular is incompatible with the more technically advanced SDHC cards.

Your fix is to either replace your camera with a later model or to stick to using SD cards with a maximum 1GB capacity.

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once you insert the card you have to go into your menu and reformat the card. reformating will erase its contents so keep that in mind.

It could be one of two problems. The most likely is that the card reader you are using cannot read SDHC cards, of which all 4GB and larger cards are. Try using the camera's cable to download to your computer directly to the USB port. I bet you'll find that it works that way. The other problem could be (but not likely) that you are shooting on the RAW file format, instead of the jpeg file format. Most software cannot recognize RAW files, but jpeg is pretty universal.

Thanks! I'll give that a shot.

:)