First of all a confession - I am a librarian!
My pictures on my PC are strictly organised into folders and, within those folders, sub folders e.g. Under the main folder Egypt I have subfolders such as Gaza, Aswan, Karnak etc. My pictures are then filed under these folders. Recently I have moved the folders exactly as they are on my PC to my Asus Transformer. Under Astro File manager the folders appear as on my PC. As soon as I go to look at my photos in either Gallery or QuickPic they have lost my carefully worked out folder organisation - a librarian's nightmare!! I cannot fully comprehend what the apps have done, but it looks as if subfolders have come out of the main folders and stand on their own. I do understand I can create new folders within the apps, but why should I need to do that when I have already painfully created my folders.
If anyone has a similar issue and resolved it I will be very grateful to hear the resolution or maybe there is another app that simply keeps the original folder organisation of the picture owner!