I have a Mac mini that runs a Samba server through the "file sharing" option in settings.
I can create files on it and my clients can access it. However, creating files on the client end causes my Mac not to have access to those files.
There doesn't seem to be a way to change that on the client end. I tried going into properties and unchecking the "read only" option on the file but it gets checked again when I hit "apply." My clients are Android and Windows.