HDD not detected — what to do?

If a drive isn’t detected:

1. Check cables/ports: Swap SATA/USB cables and try different ports.
2. BIOS/UEFI: Verify if the drive appears in firmware.
3. Use diagnostics: Tools like CrystalDiskInfo or GSmartControl help assess health.
4. Test in another PC: Rule out host issues.

If still undetected, a severe mechanical/electrical failure is likely—seek professional recovery.

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