k100d memory card error

I have just bought a Pentax K100D DSLR. There was no memory card with it so I purchased Scandisk 64GB SDXC card. I fitted the card and turned on the camera and just got "memory card error" come up on the screen. So being new to this type of camera I returned to Argos to get a replacement card, I spoke to a member of staff who is their "technical guy" who said that the card was incorrect for the camera, and suggested a Scandisk 32GB SDHC card, this I purchased and fitted it in the shop with the same results "memory card error". He then looked up the Pentax/Ricoh website and suggested downloading an upgrade of the firmware for the camera, from version 1 to version 1.02. I have tried to download this upgrade but without success, can anyone help please. P.S I did try an old 32Mb card and the camera worked why is this??

Hi, SD cards work in SDHC readers but not the other way round. Down to the age of the camera when such cards didn't exist. Your camera card slot would also have an upper limit of 32GB I guess.

There is a firmware update for the K100D that allows the use of different/newer model SD cards, so you will have to do this. I had to on my K100d, for this very reason. You'll obviously need a card that works with the camera to undertake the firmware upgrade procedure.

http://ricoh-imaging.ca/en/support/digital/k100d_s

It's an old camera now though and memory tech has advanced. If the firmware update doesn't help then you'll have to sauce an earlier model/lower spec card.

I've never used such an advanced card with my K100. Try a cheap SD card, I bet it'll work fine once formatted. (You'll get some lovely shots from that old sensor.

Get yourself a cheap 4GB or 8GB SDHC card, use that for the update and keep as a spare once you've got the other one working.

nearly sure until you update the firm ware the max size card you can use in the k100d is 2gb I have a k110d and that was the case