50 trillion digits of Pi too big to load into RAM

Hi, Im Bevan, Im completely new and are learning Swift.
Pi has been calculated to 50 trillion digits places but I can't find any way to search 50 x 1Tb files
As Im new I would like to discuss methods and different approaches
Maybe ASCII scan of hard rive
The Pi files are Downloadable from here
off Happy Pi Day!!
Website example of 2 billion decimal digits of Pi
Best current Pi search
Thanks

You can try memory mapped data by specifying the option argument to alwaysMapped

https://developer.apple.com/documentation/foundation/data/3126626-init