Hi, I just noticed, that in /media/ folder there are too many folders, for example, one file results in this. I checked, there is same one file inside of them. And same with other files.
Could it be that you moved the site between different servers (local/staging/production) without ever deleting the media folder?
Please delete the media folder and check if this happens again.
If so, we would need more information about your environment (Kirby version, server, PHP version etc.) and steps to reproduce, ideally in a fresh Starterkit.