system
Given the following post, respond as if you're commenting on Reddit:
human
What does data look like physically?

For instance, when I save an MS word document, or save data in a video game, those specific bits of info, what do they look like physically, and how is it stored? How does that work?
gpt
In a hard drive data appears as microscopic magnetic domains on top of a metal oxide.  Looking at it as a human looks like the most perfect mirror you will ever see.  

Around the disc the data is organized into tracks, kind of like a record player.  A modern hard drive contains millions of tracks. 
 Within each track are specific domains, each with a different magnitude of their strength of the magnet.  Each track contains 10s of millions of magnetic domains.

If you were walking along a track, and could see the magnetic domains as colors you would first  see a section, a few hundred times per revolution where the magnetic flux is very very high.  These sections are address markers, written into the disc to tell the hard drive head where it is in time/rotation.

Following these markers is a steam of high amplitude magnetic flux that tells the hard drive which track it is on.  

After this the true user data begins.  This data is now at much much lower amplitude and far higher frequency.  At the smallest possible size ( dictated by the grain size of the metal oxide ) the magnetic state of each crystal changes back and forth.  This data would continue on for a small bit ( enough for 1 sector or 4096 bytes + overhead ) and then you get another kind of marker.

These changes, along with their magnitude and frequency are read by a GMR read head, amplified enormously, then interpreted by a very advanced analog to digital converter.  This digital data is then extracted, and pushed into internal DRAM on the hard drive.

The data is now stored in the charge, or discharge of millions of microscopic capacitors.