See these articles below as it is just for your info only because using the maximum megapixel on our camera doesn't always serve the best solution for the best quality pictures but dampen our storage purpose (as it doesn't sound like an intelligent / smart solution to storage your beautiful pictures) as it is greatly determine and depending on what is your intended print out to be..... 3R, 4R, 5R or 8R etc...
The megapixel is serve for print and editing purpose only not meant for Quality purpose as the larger the megapixel, the more space it would take up our computer / notebook thus will also slow down our computer / notebook's speed! Quality / Beautiful Pictures is very much determine by your camera's setting especially the exposure settings can have an effect on print quality but not the megapixel. Please note that a high ISO will add digital noise to the final print. An ISO 800 photo will look better printed at 5 by 7 inches than at 8 by 10, even if you use a 10-megapixel camera.