unable to access file created by someone else.

default should be "read/write" to accomplish what youre after...

But from what I understand from the documentation, default of read/write means that anyone will be able to use the share.

i just changed the settings as you suggested, but I still have the problem.

What happens if you change the settings back to what you wanted then go to the Advanced Options tab, select group1 as the owner group, check "Set permissions for..." and click Apply. Do things work fine when you add files after that?

After every change I make I go to the Advanced Options and check the "Set ownership and permission for..." and then apply to ensure it fixes the files, but it doesn't change any of my problems.

If I set to "Read Only" and turn on Write for the group, no one can write to the shared.

The setting in the Advanced Options are all set as "Read/Write".

------------------------------ UPDATE.......

well I checked out a few other things and noticed I was still running firmware 4.2.5, so I upgraded to latest. 4.2.22 and reset everything.. Now works with following setup.

Default Access: Disabled
Read-Only Users: user1,user2
Write-enabled Users: user1,user2

Removed all the files and res copied them back via the accounts logged in and now user1 and user2 have complete access to all files..