Every time I cleaned up I regretted it a few weeks later so I stopped doing that. Storage is cheap. Keeping storage alive is not cheap however so just power down the drives and maybe spin them up once every 6 months or so, so the bearings don't seize if it's spinning rust.
In addtion, it's increasingly looking like LLMs will need inordinate amounts of data to get it to the next level. If we want this to be personalized this will certainly mean slurping our digital lives into a format for training (let's assume you can do this locally and maintain privacy).
I'm looking forward to using these capabilities to enhance my memory, and indeed one day merge those capabilities [h+]