Your motherboard:
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1 x M.2 Socket 3, with M Key, type 2242/2260/2280 storage devices support (PCIE mode only)*2
1 x M.2 Socket 3, with M Key, type 2242/2260/2280 storage devices support (SATA mode & X4 PCIE mode)*3
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Which specific m.2 drive do you have?
SATA or PCIe?
Which m.2 port is it connected to?