This is callled data connections and it is possible, but you need to understand, the data is pulled from the other sheets, not pushed.
So you have a master sheet. This sheet is called MASTERSHEET, and is stored on the X drive (network share). This sheet is where you store your values.
Now, you have another sheet (named SECONDSHEET), that is stored on your local C drive. Your local machine is also mapped to the resource of X drive. Open SECONDSHEET, and click on the data tab.
Now click on CONNECTIONS. when new module pops up, click the add button. On the bottom of the new module, click BROWSE FOR MORE. Select ypur X drive and navigate to your MASTERSHEET file location. Finish the setting up of the data as you see fit.
Now, whenever SECONDSHEET is opened, it will pull the data from the MASTERSHEET.