Removing the "submission folder" files

I’m using a 2.471 OJS.

I’m approaching the limit of the space offered by the webhosting and unfortunately an upgrade of it is not possible (old hosting, etc.).

It is possible to delete the articles form the “submission” folder and keep only the one in the “public”?
At least for the articles that have been published long time ago, with low chances to be changed\updated.
Is removing of the mentioned folders affecting the stability of the platform?

Thank you.