Have you ever wondered why Nikon cameras like the Z 5 mirrorless have two media card slots? Like Nikon is saying 1) Incremental storage 2) backup 3) RAW or 4) video separation but they forget 5) checking other cards, without removing the main 6) organise your footage on various cards 7) if the first reader is damaged, you can still use the second one, without need to ... 8) you can have small cards on 1 and a big card on 2 (means like 2. and 6., but a mix!)

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