Newbie here. Last night while trying to dump iphoto pics to external HD ... something happened. All of my desktop icons were gone. When I click on desktop, it shows the 20k+ photos listed in that folder. I have no idea how they got there, but it will not allow me to delete them from my desktop folder. It's giving me the warning that they may be being used by another folder. I can click 'ignore' and delete ... but I obviously don't want to click this 20k+ times. Any help ... go easy on me.