I tried once a suspicious pdf scan at virus total of 200 Mb => File was to big, these image “files” (Windows Explorer does not let you open the folder) are 30 Gb

Anyways you seem to be interested in these backup system images which maybe contain some latest and newest hack, probably a key logger virus (installer) that remains even after a rebuild OS, we can DM Twitter chat about it at @art_rotterdam, just follow me and send notification for DM