To create a new folder in GitHub, you must first create a new file and add that file to your new folder at the same time. Do this by navigating to your repository page.

Next, click the Add file dropdown menu on the right.

Select the first option labeled "Create new file."

To create a folder, name your file as follows:
Type the folder name followed by / and hit [[Enter]]

The folder name will automatically generate a new folder. Now you can give your file a name.

You'll need to commit your changes. Give your commit a name and a description.

Finally, hit "Commit new file" to finalize the changes.

Creating a new folder in GitHub cannot be done directly. Instead, you must create a new file in order to populate your folder. Once your folder contains at least one file, you may add additional files to it.

How to Create a Folder in GitHub