Sounds like the 'Cyber Brain' implants from Ghost In The Shell. The military or group application seems exactly like the section 9 in the series.
Just because there are no detectable radio signals doesn't mean there is no life, it may just be pre-industrial. WWII pushed us into the modern era. Without that we may still be using megabytes or even kilobytes and leaded gas. Maybe there is a planet with a single race and less aggressive tendencies, they may develop in a different fashion, while being advanced they may not be pumping massive RF for long-enough for us to detect. Not every species is going to be or was as addicted to TV and Radio as we are.
Even half this space would yeld sufficient space for a 'mesh' backup network AKA crashplan software for a good size organization, with a solid gigabit or 10 gigabit switch on your network, a full cross backup could be completed overnight even for a org that produces a lot of multi media content. One exiting option would to do a full then differential snapshot backups for all pc overnight to a central server with a box of these drives. Any major problem with a pc and you can just re-image yesterdays snapshot.
Yeah. That's me backup in a backup in a backup >>>
Seriously I had my full music library nested 3 times over. When I backed up, I left the main folder on the other drive and absorbed it into the next backup as so on. Very sloppy management on my part.
Now that I have a new laptop and am retiring the 5yr old desktop I plan to manage data much better.
Not that I have a choice on a 120gb main drive and a 160 external versus a 300gb+80gb + 160 external.
Too many drives just make for a mess of data.