Some people don't take pictures or videos. I take the occasional ephemeral photo of my dog doing something stupid. I have maybe 20 photos that I know of from the last year or two and they're all of stupid crap. On my phone. At least 25% of those photos are of my dog mid-yawn. Not kidding.

However, I do have something like 6TB of active desktop storage (not including NAS) at capacity because of software, audio samples, disk images, virtual machines, backups, documentaries and shows, etc.

Everyone just uses computers differently. My mom's storage is something like 2TB and I think about 70% of it is home movies and photos. The remaining 30% are duplicates of some of the same files, likely on the same disk in different directories.