OK. So, when I copied the DCIM folder onto the computer in mass storage mode, everything was there - many more images and videos than I found in xterminal looking into the DCIM folder, and obviously more than I could find using the photos or media apps. So, I think there is an indexing issue that I should remedy even though I do have the images. (BTW, I did de-install Extra Decoders Support last night.) So, the idea of re-indexing appeals to me. Can someone walk me through those steps? The 'tracker-process -- hard reset" doesn't really get me anywhere.