Originally posted by Pat_H Must be this ancient computer. Drat.
Originally posted by jatrax If not get a new USB card reader @ $10. That's what I did for my wife's computer.
Your card reader is probably only SD compatible while your new card is SDHC.
Keep in mind that the bigger file sizes of the K3 pretty much demand the transfer speed of USB3.
In your "ancient computer" this would require the addition of a USB3 (pci, pcie) card inside the computer and then either the camera (via a USB3 lead) or a USB3 card reader plugged into the new card (directly or via a USB3 lead) .
However, your camera plugged into your computer via USB2 (your existing setup) should still work so perhaps jatrax it correct about the MSC/PTP bit.