I used floppy disks regularly at school with their computer through at least sixth grade, mainly using them with the Apple IIe systems that they had at the time.
Also, when I got my first PC at home, I regularly used floppy disks, mainly the 5¼ inch kind, not just for loading programs, but to save some files as well.
When I got a somewhat more recent computer back in 2001, I regularly backed up certain files to 3½ inch diskettes, and would continue using them well into the next decade, including at school to take my files that I worked on at school home, but usage began tapering off around 2009 or so, to the point where I now only have one PC that has a floppy drive-a Compaq Presario from 1998 that I got in November of 2001-which I only run occasionally just to relive the memories of Windows 9x.
I have, though, archived (zipped) the files that I had on my 3½ and 5¼ inch diskettes quite a few years ago, in preparation for when floppy drives couldn't even be used at all.
The 1.44MB format wasn't the only major floppy format around. There were several different disk formats and sizes over the years, the most common ones used by IBM-compatible PCs consisted of:
3½ Inch:
- 720KB double-density
- 1.44MB high-density
- 2.88MB extended-density (never caught on, and thus, extremely rare if not essentially extinct today.)
There were also "DMF" formatted disks carrying up to 1.7MB per floppy, said format was primarily used for software distribution, most notably Windows 95.
5¼ Inch:
- 160KB single-sided double-density (8 sectors per track)
- 180KB singe-sided double-density (9 sectors per track)
- 320KB double-sided double-density (8 sectors per track)
- 360KB double-sided double-density (9 sectors per track)
- 1.2MB double-sided high-density
In addition to the PC disk formats I listed above, there was also an 8 inch floppy disk, which was the original size to be introduced by IBM in the 1970s. I remember my Skill Center computer networking instructor showing our class one of these, and I was in awe at how humongous it was. In fact, 8 inch floppies are larger than CDs/DVDs/Blu-ray discs (comparable in size to 5¼" floppies) and even most 45 RPM records (7 inches in diameter)!