Yes, for those who made copies, they could!
But many, don't make copies.
Duplication to 3 locations is a typical and well adopted strategy, patticularly for commercial work, duplicating files and working with a copy is always first op.
that's a copy of THREE seperate steps of the same files. Very large files at that.
Comes with the territory. Bit of a shock to those coming from a photography background maybe not only impact on storage but also even cost of basic video and audio related hardware outlays.
But you could compare storage usage between a Canon raw video project where recording times can be shorter due to card controller restrictions and trying to be efficient in what is captured versus a typical compressed video project where the camera can be left to run on or multiple shots of same scene resulting in what can be hours more video to trawl through.
I make copies of the DNGs, but don't make copies of the .raw container file.
FWIW I do the opposite, instead storing the raw and dumping the DNGs. The raws take less space than the extracted DNGs but more importantly if/when raw2DNG improves then DNGs can be extracted again if its worth it or needed.
But whatever, who cares, its not helping the OPs situation.
