My first HDD has a 540MB drive, I ran DOS. Eventually I upgraded to newer computers, and I opened the old drive, and put in on the wall on display. It stood there for at least a decade, possible 15 years, before I moved to a different country. Before leaving, I decided to connect the old drive to a computer, just for kicks.

Remarkably, I could read data off it. Not much, file i/o mostly ended up in failure, but I could at least see the file structure. I did not expect this.