If you’re new to Gmail, it might not be immediately obvious to you how to create a new folder. But once you figure it out, it’s a simple process. First, find an email you’d want to keep in that folder. Open the message and then look up at the top for the folder icon. Click the little arrow next to the folder and you’ll get the list of available folders. Choose Create new.
Then name the new file.
It will now appear among your options when you click the file icon.