First hard drive I dealt with was a CDC Hawk. Stored 10 MB, and bore an uncanny resemblance to a top-loader washing machine, both in size and operation - you raised the lid to install/remove the 5 MB removable cartridge (it had a 5 MB fixed platter and a 5 MB removable one).
Edit: Ahh, here's someone selling one on eBay: https://www.ebay.com/itm/CDC-Magnetic-P ... 3432012322
To give you some idea of scale, the platters are 14" in diameter. The bottom half of the enclosure is a large blower (like you'd have on your furnace) and HEPA air filtration system, which are used to pressurize the entire interior of the drive with filtered air during operation to exclude dust and prevent head crashes. On initial spin-up there's a mechanism that sweeps small brushes across all of the platter surfaces, to ensure any foreign particles adhering to the platters are dislodged and blown away by the filtered air before the heads load. Periodic maintenance is required to replace the air filter (and brushes, if the drive is spun up and down frequently).
The head assembly alone weighed a couple of pounds; a full-stroke seek was clearly audible from across the room, and a power-off head retract made a pretty loud "thump". We used to have contests to see who could write the "best" program to do repetitive long seeks at the exact rate required to rock the entire enclosure back and forth, and get the drive to "walk" across the floor.