How do I share it with everyone by default?

When a specific user uploads a file, want to automatically share it to a specific group.
Instead of manually selecting sharing, automatically upload and share with groups.
Or data uploaded by the specific user can be read and written by all others.

Well, you can achieve this when the folder, you upload your files to, is already shared.
Let’s say your folder is:

you can share this folder then with the group you want and give them edit rights. Now whenever a file was uploaded to that folder, the whole group can see these files as well.

I understand that it is necessary to put it in some folder.
Thank you.