Switch -OS - save NTFS streams
This switch has meaning only for NTFS file system and allows to save alternative data streams associated with a file. You may need to specify it when archiving if you use software storing data in alternative streams and wish to preserve these streams.
Streams are not saved for NTFS encrypted files.
Shell mode equivalent of this switch is the "Save file streams" option in the Archive name and parameters dialog.
This switch is supported only for RAR archives.