mkfs.vfat automatically selects a fat size based on the size of the partition. It doesn't really matter, as it's only for the boot partition.
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Thanks for the explanation. 👍🏼 Appreciate your active replies and plain English yet detailed online documentation. That’s how one onboards new users of varying abilities. Good job nostr:npub126ntw5mnermmj0znhjhgdk8lh2af72sm8qfzq48umdlnhaj9kuns3le9ll