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The file mp4_scan.$$$ is a diagnostic file for internal use with CnW Recovery software.  It is stored inn the cnwdata\temp directory, and so deleted each time the program starts.  The file stores the result of the disk scan, looking for various MP4 type atoms.  Once the disk has been scaned, the results are then analysed to determine the type of vidoe that the memory chip contains.  It is then possible to determine the original order of the data, and hence reconstruct the video files.

The structure of the mp4_scan.$$$ is subject to change (and so not published) but does contain information such as sector number, atom type, atom length, and offset of atom within the cluster.  By e-mailing CnW the file, it may be possible to determine new disk layouts.  This is most relevant for memory chips, rather than hard drives that contain videos.

The following descriptions are for the types of video that CnW currently recognises.  The names are unique to CnW as CnW is not aware of any industry standard.