What will happen if the disk space is not enough during downloading a very big file, like 2GB?

## 💬 Questions and Help
If I am starting downloading a very big file, and the disk space is not enough for the file, what will happen?

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- The [Flutter tag in Stack Overflow](https://stackoverflow.com/questions/tagged/flutter)

No file, test, or entry point is named in the issue. Start by inspecting the package's documented and implemented download and cache-storage behavior for insufficient disk space, then record a clear answer; the issue is done when the outcome for a very large download is documented.

索引モデルが issue の本文から書いたものです。