If you need complete access to the entire drive by Everyone
on your network simply go into the Security tab
of the drive and use the advanced sharing settings then enter Everyone in the open box when it comes up. Use the check marks for full access as required. This link shows you how> HDD sharing
There are certain risks involved with sharing the entire drive with Everyone on your network. You should know who has access to your own
network and what that means. Though it is possible to allow for access by only certain people on the network, the process required for that is much more work and I don't really feel like going into the specifics right now. From a security stand point you would be better off sharing the entire USER folder if you need that sort of access.
And before anyone tells me this isn't a very safe way to share, I'm well aware of the risks involved but keep in mind I have warned the OP and I am giving the Op EXACTLY what they are asking for.