Files 16 is an official Google system app, which comes pre-installed on many Android devices, whose function is to assist in managing files and documents. Basically, this app helps other apps, such as web browsers and image editors, in the process of accessing and storing information on the device's memory.

A sensitive app that's better not to delete
Sometimes, when people try to make space on their device's memory, they may delete apps that they no longer use or that they simply don't remember