Well finally. I was talking about this some days ago, I said that I wondered that there wasn't a lot happening lately considering HD capacity, that the 2TB drives are already for longer time on the market now, but not any news about bigger sized ones since quite some time.

The only thing that bothers me with bigger capacity disks, is that if they fail, there's really a huge amount of data lost, you obviously need to have 2 of them running, mirrored or in my case "manually vice-versa'd".

I would say that the speed is not that much important for these disks, at least not for me, mainly would use it like you mentioned as general storage or backup, wouldn't use a disk like that to boot from. Although with my 5 2TB disks I have, one is used to boot from. It's partitioned, 100GB is the system partition, the rest is storage. If I would buy a new PC now, I would definitely consider installing an SSD disk as system disk, albeit only a small one, like a 64GB, that's enough for a system partition, and the disks are affordable now, at the time I got my new PC (beginning of this year), they were still more expensive. And if one time I plan to do a fresh install, I would eventually get an SSD.