Permission problem with group, from desktop to NAS

(having apache error when trying to post, may be repost, excuse if it is)

Hi,

I really like linux, have used it for my desktop for years now. I like to tinker and work out problems as they arise.

This problem has stumped me.

Problem: when I copy files from desktop to NAS, when i check the permissions on the file on the NAS: owner=me read/write, group=public read only. The real problem is that when I have to use my Win10 box, I am unable to modify these files on NAS.

I mount via fstab line and CIFS.

OS: Ubuntu 16.04.1 LTS

NAS: NAS4free

I am not sure how to have the existing group=public be read/write.

Rambling and humbly yours,

fisheater