However quickly the storage capacity of hard drives, solid state drives, USB sticks and so on grows, it is unlikely that they will ever match the capacity of your brain.
The human brain has a whopping storage capacity of 256 Exabytes. Maybe that doesn’t sound too impressive. Ok, let’s put it another way: your brain is capable of storing 256 billion Gigabytes; and if that didn’t impress you, how about the fact that that’s the equivalent of 1.2 billion average hard drives. Click here for a visual representation of these figures.
Saying that, you can’t choose what you want to erase from your memory and what you want to replace it with!