And, to some extent, it is. We, too, have a sensory buffer called immediate memory, usually seen as a ghostly image of a flashbulb, rather like the keyboard's type-ahead buffer. It is also as volatile, because its contents can be lost following a concussion or seizure. In humans, the process takes days or weeks to complete, most likely because you have to strengthen synapses into a new pattern. Unfortunately, the analogy ends there.
Human memory is cluttered.
Memories don't get lost so much as they become distorted or hard to find. The serious difference between computer and human memory is that we don't pop out a pristine copy of the original event, the way a computer does. Instead, we reconstruct things as best we can from all the clutter. Often that isn't good enough, especially for a fair judicial process. Twenty years ago, I tried predicting memory's future.