If you run a site that has a lot of products or you make changes to images frequently, over time your directories will be cluttered with old, unused images that are just taking up space.
Luckily, Magento Connect has an extension called “Image Clean” that I would highly recommend installing.
It was one of the most efficient and cleanest installs I’ve done, and it worked perfectly right out of the box (CE 1.7).
I’d recommend after install and backing up, you build the list and select one or two images to delete – check the results and then proceed with the cleanup accordingly. Make it part of your regular maintenance routines so you don’t build up thousands of old images that need to be cleaned up.
My thanks and congratulations to an incredibly efficient and effective extension.
The extension can be found here: Image Clean