How to resize files in assets folder at upload

Hi, when I upload over 2000px image to assets folder,
Intrinsic size is always around 800px…
i wonder… is there any automatically resize system…?

When you upload files to the assets folder, you usually don’t do this through Kirby, but upload via FTP or so. So Kirby cannot resize them for you. You would need some script that does that for you.

You can automatically resize files you upload to the content folder (via the create option in file blueprints).