What type of SSD? There are basically four types:
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2.5" SATA, looks like an old HDD
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mSATA, a PCB with two screw holes.
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M.2 SATA, a PCB with one screw hole and usually two notches.
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M 2 PCIe/NVME, a PCB with one screw hole and usually only one notch.
The latter two are physically compatible but electrically not. It just won't work.