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Continue to ChatThe QNAP NAS Show 2013: From Small (TS-220) to Medium (TS-421) to Large (TS-870U-RP) https://www.digitalreviews.net/reviews/storage/the-qnap-nas-show-2013-from-small-ts-220-to-medium-ts-421-to-large-ts-870u-rp/