Giada is able to generate two kinds of files: projects and samples.
A project is a folder called (project name).gprj that contains all the samples in use in your current song and a JSON-based file called (project name).gptc that stores the project information. You can save and load a project from the file option in the main menu.
Being a project a regular folder in your filesystem, you can browse it, add new content and edit the project file in case something is wrong (it shouldn't!). You can also get fancy and write the project file by hand or generate it with a script. Be careful not to delete any file in the folder, as you might end up with missing samples.
A project is portable: you can save it on your computer and move it to another one. Note that audio plug-ins will not be stored in a project: make sure the required plug-ins are installed also in the target system.
Giada can export samples to file. This is useful for edited samples or recorded takes. At the moment only WAV format is supported. You can export the sample to file by clicking on any sample channel's main button and select export sample to file....
The edit option in the main menu offers some additional actions: