I worked for a small manufacturing company some years back, and depending on what you're doing it's easy to rack up some huge file storage usage and big databases without being in the business of video, photography or music. The database that only ran our manufacturing, not inclusive of HR, accounting, etc., was about 1TB. The design files that went to the plant (most of which were just text, you could open them with Notepad) were another 3 or 4 TB worth. Maybe another 1TB or so for various collateral bits of data related to jobs, mostly PDFs.

The company has, I'm sure, probably tripled all that by now. In their case it compressed really well, but still.

All that to say, YMMV, significantly.

Corporate backups include entire VMs, not just files. So you are looking at something that is closer to 40TB than to 40GB.