I'm building my own photo gallery for my website, and my initial plan was to have the following folder structure:

/gallery/ (for the main pics, around 600px wide)
/gallery/fullsize/ (for the original, around 1280px wide)
/gallery/thumbnails/ (for the 150px wide thumbnails)

They will be organized in a database.

I have most of it working now, and am working on the layout for the main gallery page, BUT when I went to download all the pics from my old photo gallery (which was a Gallery2 install), I noticed that each album has its own folder. Now I'm second-guessing my album design.

What are the advantages of creating separate folders for the different albums? Is it work modifying my gallery to create subfolders?