What is the Computer Name of my Mac?
When Selecting Configure Network Shares and Enter Share Name Manually, you are prompted to enter the \\ComputerName\Share. When looking at the File Sharing options in the Mac's System Preferences it would often reference the user name in the Computer Name such as John Smith's MacBook Pro. This leads to some confusion.
What you can do is enter the true NetBIOS computer name of the Mac as the Computer Name.
This can be located in System Preferences, Network, Advanced..., WINS as depicted here.
Rather than entering \\John Smith's MacBook Pro\Music and possibly result in an error (due to apostrophes or spaces), enter the NetBIOS Name \\MACBOOK-001A\Music.