https://en.wikipedia.org/wiki/History_of_the_floppy_disk#Evo...
Epson started making SD-560 5.25" HD drives in 1983.
In 1985 3.5" 1.44HD floppy drive was $145 in Japan and NEC was shipping those inside PC-8801 mkII MR.
In 1988 NEC was selling PC-88 VA3 with 'Triple' or '2TD' format 3.5" floppy sporting 13MB unformatted 9MB formatted capacity.