All non-domain user and computer to access file share on domain member server

1.    Enable the "Guest" account on that domain member server which is hosting and sharing those files and folder (e.g. File Server)

2.    then grant the "Everyone" group on the share folder “security” permission (NTFS permission) and share permissions

“Security” Permission (NTFS Permission)

Share Permissions:

Reference:

http://serverfault.com/questions/51635/how-can-an-unauthenticated-user-access-a-windows-share

All non-domain user and computer to access file share on domain member server