華碩官網說明
1 x M.2 Socket 3, with M Key, type 2242/2260/2280/22110 storage devices support (both SATA & PCIE mode)*2
1 x M.2 Socket 3, with M Key, type 2242/2260/2280 storage devices support (PCIE mode only)*3
6 x SATA 6Gb/s port(s)

Note
*2 When the M.2_1 Socket 3 is operating in SATA mode, SATA port 1 will be disabled.

*3 When the M.2_2 Socket 3 is operatin in PCIe 3.0 x4 mode, SATA ports 5 and 6 will be disabled.

所以最多就是7個Storage devices嗎?
1個M.2 PCIE 接在 1 x M.2 Socket 3 (both SATA & PCIE mode)
6顆HDDs 接在 6 x SATA 6Gb/s port(s)

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