Well, Mr. P !!!
Hashing seems to be about the only 'logical' conclusion...
What else could it be ?

I mean, on a rough guess, not knowing at what level of 'quality' he is doing what are presumed to be .mp3 files, it must be at least 40GB... And, if they're .wav he's sharing, than we could all retire for a month on what it must have cost to buy that external drive, huh ?

Gotta be 'hashing', but why on every launch ?

Hey, 'logical' conclusions about anything related to computers !!!
That's funny !