As part of my usual workflow I often start with a project that contains a whole recording. This project necessarily will be huge, simply because the track is, say, 60min long.
I will sequentially repeat the following steps:
I mark and copy a fraction from this track, e.g. a movement of a symphony.
From the Audacity project already open I create an empty Audacity project.
I paste the fraction copied in the other project into the new, empty project.
I save the new project.
I noticed that even if the fraction copied and pasted is very small, e.g. only about 15sec, the resulting project file will be about the same size as the 60min original file.
My Audacity version is 3.1.3.
For comparison: With Audacity 2.4.2 the project data directory of the copy containing only a small fraction of the original project has been much smaller than the data directory of the original project.
Thank you! There’s one decision, however: The 4th item in the bug you pointed to reads different from what I reported: I did not see the whole original being pasted to the new project instead of just the snippet copied; I can only infer that more than that got copied from the file size.