Yep I am older no doubt. My floppies were really floppies - flexible as big as a DVD box. The 3.5 inch disks came a few years later and they weren’t flexible, but people still called them floppy disks.
Before that, I used an Intel 4004 processor in a recording system to measure driving conditions. It used a Texas Instruments CRT monitor (emulating a teletype printer) and two cassette recorders to store files. The 4004 was Intel's first commercial processor. It was the precursor to the 8008, which became the 8088, the first PC XT processor.
Even before that, I used a DEC PDP-11S, one of the first real mini-computers. It had a whopping 4K of core memory. Core memory stored data on tiny doughnuts of iron with three wires running through the middle of each. The wires could detect and set the magnetic state of the doughnut, whether it was magnetized, or not. There were 50,000 of these doughnuts in the core. Each had three wires strung through the middle, hand wired by humans. The core was a cube, about six inches on a side.
The bootstrap loader consisted of 17 instructions, each entered bit by bit using switches. This loader commanded a paper tape reader (teletype again) to run and enter the programs. Messing up the software, which happened many times, usually meant overwriting the boot strap loader, which would then have to be entered bit by bit, over, and over, again. Fortunately, the core memory would (usually) remember its magnetic state with the power off, so powering off would not erase the programs loaded in memory.