Every time I've googled the storage capacity of the human brain I've gotten a different answer, and the estimates vary wildy. We do have a reasonably accurate figure for the number of neurons (86 billion) but we really don't know the storage capacity. But know that if you were filling up your 3000TB storage capacity over say 200 years, it would amount to 15TB a year, 41GB a day, 1.7GB an hour, 28MB a minute or 475KB a second. It is not likely that you would ever lose your keys if you could remember that much data, as your brain would be storing multiple megabytes while you were misplacing them.
Of course, the data needed to describe the brain might be much, much higher than the data capacity.