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フロッピーを令和になっても使う理由の一つで、フロッピーに…
→ “One of the reasons for still using floppy disks even in Reiwa era is... because floppy disks...”
フロッピー froppī¹ = floppy disk (noun)
を o = (object marker particle)
令和 reiwā¹ = Reiwa (era name, noun)
令 rei = order / command
和 wa = harmony / peace
に ni = (temporal target particle 'into')
なっても nattemo = even if it becomes / even when (conditional clause marker)
使う tsukau = to use (verb)
理由 riyū¹ = reason (noun)
の no = (possessive/genitive particle 'of')
一つ hitotsu = one (number), one thing (noun)
で de = (causal/conjunctive particle 'because', 'so')
フロッピー froppī¹ = floppy disk (noun)
に ni = (target particle 'to/for')
… = (ellipsis indicating trailing off or unfinished thought)