Cards only Madam, cards only. These little workhorses are no-frills 32GB micro SD cards. If you have multiple Windows and Android devices, you probably need SD cards. Your rating is high enough for HD video recording. I work with independent filmmakers and we need their box. Now we have it. The write, read, and transfer speeds of these cards were good enough for our needs. You just can't beat the price. I recommend these cards.
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