How to map sharepoint library with powershell?


I have SharePoint 2013 doc library, I want to map this library with power shell 'and then I can run a script  that see it as a folder and copy files to anther NTFS folder.

SharePoint library link is : "http://sitename/abigail/Shared Documents"

I tried to use New-PSDrive and I get error: 

"New-PSDrive : Drive root "http://sitename/abigail/Shared Documents" does not exist or it is not a folder."

Need help with this issue/