How to add files to project on google code?

I normally organize my project in multiple files. Now, for the first time I have created a project at code.google.com/hosting.

How to add files to the project?

The project has got directory structure and many files. I want them to be visible under trunk (like it is in other projects).

NOTE: I am novice in this area (I have no clue about what to do). I am searching for an UPLOAD button.

How do I upload a folder to Google Colab?

Access local files through the file-explorer You can either use the upload option at the top of the file-explorer pane to upload any file(s) from your local file system to Colab in the present working directory. 2. Select the “upload” option.

You need to have a source code management system to be able to do that. Google Code typically uses subversion. Either download the commandline version or a GUI wrapper like TortoiseSVN. Then, you can upload all your project files.