Hmm… that’s the odd thing, the steps I provided above should do the trick. Are you copying all of these 800 files into your repository’s directory at once? For example, I’ve copied the folder “lessons” (which has 800+ files) into my GitHub Page’s repo. These files show up in the changes column for review.
To commit the files, I need only include a summary and then I can commit them, and finally push the changes to GitHub. To commit all the files at once, make sure to click the checkbox next to “N changed files” until every file is checked.
See Committing and reviewing changes to your project for more information.