Deleting Unused Image Sizes

My site has over 2,500 images and on my previous host, I’m not sure what happened but somehow I ended up with 7 image sizes instead of 3. The reality is far worse than that though as I just discovered by browsing the media using file manager, many of the images actually have up to 42 copies!!!

There are multiple copies of each image size, in JPG and WEBP. Not sure it is was Smush or Optimole or some other image optimisation that caused this, but as you can imaging my media library is now HUGE.

I’m hoping that Media Cleaner will be able to deal with this ok. Speed doesn’t worry me as I’m not doing a lot of site maintenance, but I am looking to move host in the next month and would like to clean things up before then.

I’m going to take a backup of my site, which I know will be huge, but any advice on the best wat to approach the cleanup would be appreciated.