"New Folder" Option Missing/Disabled in SharePoint List/Library?

So in your SharePoint 2007 List or library not getting "New Folder" option ? or the "New Folder" ribbon button is disabled in SharePoint 2013 or in SharePoint 2010? Well, Here is the fix: Go to

• List/Library  Settings >> Advanced Settings 
• Make sure the "Display 'New Folder' command on New menu?" option is marked "Yes".
• Click on "Save" to commit your changes.

Same thing goes with SharePoint 2010 and SharePoint 2013 also.

Why Still New Folder is disabled in SharePoint 2007/2010/2013?
You enabled the above option to make "New Folder" enabled, but still "New Folder" button is disabled? Well, in addition to the above settings, There is one more thing to look at is: View Settings!! Head-in to view settings, If the option to show items without folders, then the "New Folder" button will be disabled in SharePoint!
Just make it to "Show Items inside folders" to get New Folder option in SharePoint.