«You have a memory like an elephant,» is truly a compliment. Researchers document all kinds of remarkable examples of the recall power of elephants, and this is credited with their ability to survive harsh environments as noted in this Scientific American article http://www.scientificamerican.com/article/elephants-never-forget/.
Our human memory also helps us learn from past experiences and mistakes, avoid recognizable hazards and keep track of our very busy lives. Our memories for the most part have served us well, but the same might not always be said about digital memory in an always connected, real-time world.