Usage patterns
ハードな〈事〉a tough/demanding ~ (schedule, training, etc.)
This week has had a demanding schedule.
〈事〉がハードだ~ is tough/demanding
This training is pretty tough for new employees.
ハードに〈動詞〉to do ~ intensely/roughly
He works his body hard every day.
ハードを増設するto add/expand hardware (storage etc.)
Since we were running out of space, we added more hardware.