My computer can't find my old HDD after I installed my new m.2 card

I've been using my computer for a little over a year with no problems, I have a "SanDisk SD7SF6S-128G-1122 128GB X300 SSD MSATA Card" as an SSD and a "Seagate 1TB Desktop Hard Disk Drive 7200RPM SATA 6Gb/s with NCQ 64MB Cache 3.5" as an HDD. I have run up about 400-500 GB on my Seagate so no problem there but my SSD was almost full about 40 GB left. So I purchased and installed a "Samsung 960 Evo m.2" card, installation went perfectly but when I booted back up my computer couldn't find my old half full Seagate. It doesn't even appear in "Disk Management".

Any help would be appreciated.

Motherboard: Gigabyte GA-Z97X-SLI (rev. 1.1)
CPU: Intel Core I7-1490k
GPU: RX 480
2 answers Last reply Best Answer
More about computer find hdd installed card
  1. Best answer
    Try plugging your HDD in a different sata port. Your motherboard will disable sata ports when you use the m.2 slot.
  2. What port is the HDD connected to?

    From the specs:
    "The SATA3 4/5 connectors will become unavailable when an M.2 SSD is installed"
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