Yeah, I remember at a job that I had at the time we paid ~$5,000 for a 10MB external drive. Some mark-up on that since it was part of a document management system. Same for the "high-speed" daisy-wheel printers that we had. Ridiculously expensive @ ~$10K each.
I finally got rid of the mobo that supported a 3.5" drive. Still have bootable DOS, and Win98 DOS disks hanging around complete with necessary utilities on them. I'll have to clean those out one day soon, I can use the space in my desk drawers.
My BIL has told me about the first Hard Drive his employer purchased back in the day.
Something like $11k, and sounded like a chopper getting ready for lift off.
Because Uncle Sam and Big Brother wants you. 365 days of surveillance footage and counting.
Inspired by the UK, WD Purples and Reds flying off the shelves all throughout the world
The first hard disk I used was on the PDP-8, 32k 12-bit words. I have a souvenir ST-506, the first 5 inch hard disk, 5 megabytes, cost $1,500 in 1980. The first floppy drives I bought were off-brands at $400 each. I carried a $10,000 4K memory board to a customer in 1972, on the New York subway, fearing that I'd get mugged. IP cameras are pretty cheap in comparison. Looney, I was on the development team for the TI-990 family, which includes your TI-99 box. Its architecture was IMO far superior to Intel's, but TI didn't know how to market computers, Intel did, and the IBM PC was born with Intel silicon.