Welcome to PF John.
The camera supports both the MSC and PTP protocols. There is probably a setting in the camera menus to choose. On the K-30 it's in the Setup menu, under USB connection; the manual says to select MSC "unless otherwise specified".
Note that the connection is only USB 2, so transfers might not be as quick as with USB 3 drives.
Instead of using a USB cable, the easier way might be to insert the SD card into the card reader slot on your computer. The computer should read it as a separate drive. Then copy over the files you have extracted from the downloaded zip file. If your computer doesn't have an SD card reader, get a cheap one (preferably USB 3) that plugs into a USB port.
Personally I prefer to take the SD card out of the camera to transfer photos to the computer. I find that easier than connecting the camera by the USB cable, in the congestion of my computer desk. Even if that isn't your preferred method, it's worth having an SD card reader as a backup method anyway.
Enjoy the K-S2.
Last edited by Des; 10-07-2016 at 03:39 PM.