Delete old folders before Group Folders App?

Hi everyone.
I created 3 folders with about 4GB content.
After that I set up GroupFolders with the same folder names.
Didn’t think that GF would overwrite the existing folders and it’s contents.
I assumed they will be redirected/moved to GF.
So I had to upload all the files into these new folders again.

Now I have those 3 “old” folders in /nextcloud/data/admin/files/abcdefg stored.

Can I simply delete them from the server as they are using up space or will that influence the folders in data/__groupfolders/abcdefg?

Thanks in advance.