I should check this - I still have some SD cards which I used with my T3 (I had two Tungsten T3 PDAs actually). But I think they were simply FAT-accessed, i.e. different from the internal storage. I'm unable to verify that at the moment. It's correct that there was an entry in the system menu or some such to look at the card. Again I can't check this - battery is out on both my T3 devices, and charging got more and more tricky over the years (the Palm socket was a very weak point)