Preserving or necessity? I'm not sure either, but Sandisk has just introduced the Optimus GX PRO 850P SSD with which you have the capability to store games up to a staggering 8TB.
The price is also a true symbol of 2,580.22 euros. With this marvel, you can literally forget about the uninstall option, you might even forget which games you have at all.
To put that into context: you can load it with around 100 of today's biggest games, over 2 million photos from your phone, or play music that will last for the next 11 years non-stop.
It's also interesting to follow how technology advances; in a few years, this will seem small to us...