It was the late-80’s I was a cad draftsman and new to DOS. Over a few months I drew many projects and all files were named H-1.dwg H-2.dwg H-3.dwg and so on. Upon hearing about this thing called a “backup” I proceeded to copy each project’s drawings onto 360k floppies and then deleting them. After three projects I began to wonder how much these disks held. I typed DIR and there were only three files - and it hit me that they were overwriting - you didn’t get a warning back then.
I came in that weekend and redrew three projects from the final plots on my own time. 
