In a world where we hold people accountable for stupid things they did or said when they were teenagers, I can see a lot of blackmail value in retaining data for a much longer period of time.
HDDs are fine for short term storage, but they are too unreliable when you want to keep the data for many years, possibly for a lifetime.
Unfortunately, currently there is no other commercially available method of archival storage, except magnetic tapes. Optical storage has a too low density to be able to compete with magnetic tapes.
That presumes you're putting the data in cold storage somewhere. For data that's being kept accessible, the reliability of a hard drive doesn't matter. It's transferred from RAID to RAID over time. And spy data is probably in warm storage.
Except for videos, that doesn't take up a lot of space. The oppressive part is tracking everywhere you go and everything you say, which fits easily into warm storage.
For example, storing your position every 20 seconds might take 10KB a day. You'll collect 15 million data points in a decade, but each one is only a few bytes.
> The Utah Data Center (UDC), also known as the Intelligence Community Comprehensive National Cybersecurity Initiative Data Center, is a data storage facility for the United States Intelligence Community that is designed to store data estimated to be on the order of exabytes or larger. Its purpose is to support the Comprehensive National Cybersecurity Initiative (CNCI), though its precise mission is classified. The National Security Agency (NSA) leads operations at the facility as the executive agent for the Director of National Intelligence.
“Just let me geek out for a second”
Absolutely IBM storage person, the more geeking out the better!