I've still got my K100D and K200D, both working just fine, but foolishly perhaps, I bought a K30 which failed after about eighteen months ; BAD BUY.
Not satisfied, I then bought a K3, which forgets the date and time whoever I change the battery. It is also much too complicated for my needs, and has a limited battery life compared with the AA cells in my earlier cameras.
At the moment my iMac, on El Capitan, cannot read the last lot of photos taken with the K3, but has no problems with those from the K200.
It seems that I reached for the stars, but they just turned out to be a candle in the wind.