Managing Audacity Projects
Your first step on a new Audacity project should always be to name it using File > Save As. Then you can press ctrl-S periodically to save changes or use File > Save. In addition to the .aup file, which is the project’s master metadata file, Audacity creates a directory that holds the associated audio files. You can view these in your file manager; there will be many subdirectories full of files with the .au extension.
Adding Audio Files: Import vs. Open
Select File > Open to add an existing audio file to a new, empty project. After that, select File > Import to add more files. Selecting File > Open in a nonempty project opens the file in a new window.
Saving Your Work
Audacity projects are optimized for use as fast workspaces ...