M.2 2280 Sandisk ssd + msi b350m mortar arctic wont detect HDD

Sep 22, 2017
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I recently purchased a m.2 2280 ssd and installed it, and after many reboots and attempts at troubleshooting I cannot get windows to read my 500gb HDD as a "system disk". The drive shows up[ in task manager, but it says " System disk: No" and i have no clue what to do, i've tried different sata ports and still nothing. Windows is detecting it but it wont write or read data from it.