The package writes temporary Earth Engine assets while it works and deletes them when it finishes. A run that is killed, crashes, or loses its connection never reaches that cleanup, so the asset stays and counts against the project's storage quota. This removes those leftovers.
Details
Only assets this package created are considered, matched on the `alphasdm_` name it gives them. An asset is kept if a batch task for it is still pending or running, or if it is newer than `older_than_hours`, so a job in progress in another session is not disturbed. A large export can run for many hours, which is why the default is deliberately generous.