Sparse NTFS

https://forum.ixbt.com/topic.cgi?id=22:62757

https://web.archive.org/web/20070318004154/http://www.flexhex.com/docs/articles/sparse-files.phtml

https://web.archive.org/web/20071017042555/http://flexhex.com/docs/articles/alternate-streams.phtml