QNAPS documentation seems to be all over the place for the TVS-Aih1688atx. In some places it says it actually has U.3 ports in the 2.5in slots so that supports U.2 and SATA SSDs. The website, tech specs and user guide all say something a little bit different. QNAP tech support says it will support SATA SSDs. I placed my order and fingers are crossed.