For the next version of Nop (or anyone who wishes to make a plug in), it would be wonderful to have the ability to convert all the images in the database to their respective files (if this is doable).
I made the mistake of not saving images to files (it defaults to the database storage - ugh!) and my DB's size is monstrous as a result, changing the mode to file system deletes all the large images (I have a backup, fortunately).
If someone has a tool to do this - let me know - this would save, quite literally, weeks of re-uploading thousands of images.