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Hi,<br />
<br />
I am very clueless about sharing folders....<br />
Here is the question, There is a back up hard drive and since the location has a free wifi, you can easily access the back up folder. I opened the myComputer and right clicked/properties on the backup driver. I see the security and shared shows: everyone and users and admin. For admin all checked box are marked and for users and everyone all but full is checked.<br />
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Common sense tells me to uncheck all for everyone and users, but need a professional opinion and instruction. 
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Hi,

I am very clueless about sharing folders....
Here is the question, There is a back up hard drive and since the location has a free wifi, you can easily access the back up folder. I opened the myComputer and right clicked/properties on the backup driver. I see the security and shared shows: everyone and users and admin. For admin all checked box are marked and for users and everyone all but full is checked.

Common sense tells me to uncheck all for everyone and users, but need a professional opinion and instruction. 

blocking access to other folders

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.

Routers

Hardware-based firewalls provide more sophisticated protection for inbound and outbound traffic than the simple Windows software firewall or the basic NAT firewalls found in routers. These devices implement techniques such as stateful packet inspection, deep packet inspection, and content filtering; and may include built-in antivirus and anti-malware protection.

Hardware Firewalls

Network analysis is the process of identifying and remediating the processes and systems within a network, including performance, connectivity and security. The process is performed through the use of tools developed for monitoring and analyzing network activity. Network problems that involve finding an optimal way of doing something are studied under the name combinatorial optimization. Examples include network flow, shortest path problem, transport problem, transshipment problem, location problem, matching problem, assignment problem, packing problem, routing problem, Critical Path Analysis and PERT (Program Evaluation & Review Technique).