Sharepoint Master Page

Question

I trying to move new Sharepoint Master Page put I only have a Master.file and not HTML file so when trying to upload that I'm getting an error.. Can an AP.NET even be a Master page or do I even need a HTML.file? enter image description here

Answer 1

If you want to use design manager feature, make sure you enabled publishing feature so you could convert a html file to a master page and then you could edit the master page by SharePoint designer.