%Stream files do not get purged from the <namespace>/stream/ folder on the system disk

As the title says, I've noticed that files that gets saved to the disk where the database lies (.DAT file) in the stream directory, does not get purged. Is this expected and do we need to create our own schedule task to clean this folder up?

I could only find old answers that say this, however I find it a bit odd if that is the case because they are considered temporary files. Perhaps I do not handle the streams correctly in the code?

set fileToDisk = ##class(%Stream.FileBinary).%New()
set fileToDisk.Filename = fileDestinationPath
set copyStatus = fileToDisk.CopyFromAndSave(response.Data)