I use DiskUsage on my N810 a lot to try to look for files to clean up on my external memory card. I have thought of some ways this process could be made easier. Feel free to cherry-pick based on ease of implementation/whim. :-) I have my memory card divided into subfolders for audio, images, video, etc.
* Initial Screen:allow selection of directory.
* Pop-up Dialog: when the user taps on a file, highlight in bold the highest level subfolder. For example, if I'm looking at /media/mmc1, clicking on a file would highlight the subfolder in /media/mmc1.
* Pop-up Dialog: Add buttons for "Up" and "Down" (or alternately, "Up a Level" and "Down a Level" or perhaps "Back" and "Forward" or perhaps just "Up" and double-tap on a file) that would allow you to zoom in or out one level on the folder structure. For example, after seeing the graphical representation of //media/mmc1, I might want to zero in on //media/mmc1/Audio and see that graphed.
It would also be nice to see the size in MB of the selected file (and perhaps a parent folder), but not critical.
Thanks for your consideration.