How To Hack Into Another Pc On Dongole How Can I Access Another PC If Mine Along With Another Are Connected To The Same Router/network???

How can i access another PC if mine along with another are connected to the same router/network??? - how to hack into another pc on dongole

If my computer to a network / router (wireless or not) connected, and there are other computers connected to the network, how can I get in touch or an "outsider" to another computer on the same network and be able to "All Files that display with drive C:?