Media folder contents

I was just having a look in the media folder to make sure image thumbs were generating properly and was a bit surprised at just how many subfolders are being created for a single page. For example:

Is this happening as I am updating/messing about with formats and general code or is this expected? I hope not and it’s something I am doing that does not normally cause this :confused:

Kirby creates a folder for every file which contains the jobs and the thumbs created for each.

Ok, that makes sense. Seems like a very large overhead if you multiply that by a couple of hundred similar blog posts. Potentially creating thousands of jobs folders on a larger site.