how to create a share folder
Right click on the folder you want to share and then click properties. On the properties menu click on the sharing tab
from here just click the 'share' button
now you can edit your options like who can see this file or if you want them to edit it. After choosing which you want click on the share button.
Mapping a network drive
Now the file has been shared we can map a network drive to the folder so others can find it. click the start button then click computer. You will get the screen pictured below. From here just click the double arrow (circled in red) and the click map network drive.
now just select your desired drive letter and click browse. find the folder you chose to share in and then click it and hit 'OK'. after your done click finish and you have successfully shared a folder and mapped a network drive!
doing this in the command line
to do this in the command line simple type net use drive letter (you can pick any just as long as its not already taken) \\path to shared folder
to use robocopy simply type in the drive letter of the shared folder then type in the destination of the folder on the other computer