Most things decrease in price as production scales up.
Is called Economies of scale.
There’s also a lot hype around process improvements such as Six Sigma. Some of this has come out of factories and into IT and software dev such as kanban boards and agile.
Strangely most think that software development does not have economies of scale.
Two tools worth using:
DMDE
Photorec
If the data is extremely important make a back up first.