Hello Anne!
Let me give you a few tips, because this is the way I create my categories:
1. I write down all the words I want to have in my category.
2. I create a folder for my category in the Media Library folder.
3. I then begin searching for (and creating) all the media I want to include in each word and save them in this folder.
4. Then I build my category using Little Reader.
This way, I don't erase any media file I need if I have to take away any of my removable drives or clean up my desktop or any other part of my computer.
The reason why Little Reader doesn't have this automatic function to copy all your used media into the Media Library is because it is far more dangerous to create duplicates within the Media folder and double the disk space usage than it is to organize your files and copy them into the folder itself.
If you accidentally save far too many pictures than you actually need in the Media Library folder and would like to clean up,
Little Reader has an automatic function which deletes all the files in your Media Library folder which is not being used or attached to any word 
. This is called the Purge Unused Media function, and can be accessed by clicking on the FILE button at the top left corner of Little Reader and selecting
PURGE UNUSED MEDIA.
Digg
