An SSD that doesn't show up is usually there but hidden — Windows just hasn't been told how to present it. The difference between 'it's a software/letter problem' and 'it's not actually connected' is visible in Disk Management, so that's where you start.

Check Disk Management first

Right-click Start → Disk Management. This shows every storage device Windows is aware of, whether or not it has a letter. Look for your SSD (check the size to be sure).

If it's there with a drive that has no letter

Right-click the drive → Change drive letter and path → Add, and pick a letter (E, F, etc.). It will appear in File Explorer immediately. This is the most common 'new SSD won't show' situation — the drive is healthy, it just needs a letter.

If it's there as 'Unallocated'

This means the drive has no partition. Right-click the unallocated space → New Simple Volume and follow the wizard to create and format a partition. If it's a brand-new SSD this is expected — new drives ship blank. Only do this if the drive has no data you need; formatting erases everything on it.

If it's not there at all

Then the PC doesn't see the drive, which points at the physical connection. Power off, open the case, and re-seat the drive:

  • SATA SSD: make sure both the data cable and the power connector are firmly attached at the drive and the motherboard ends. Try a different SATA port and cable.
  • NVMe (M.2) SSD: make sure it's fully inserted in the slot and screwed down. Reseat it, and check your BIOS that the slot is enabled.

Check BIOS

Reboot into BIOS/UEFI (usually Del or F2 at startup). Look for a storage or boot device list — the SSD should be listed there. If it's not, the motherboard isn't detecting it at all, which is a connector, slot, or drive failure. If it is in BIOS but not in Windows, the problem is the driver, the SATA mode (AHCI vs IDE), or a disabled drive letter.

Try another computer or slot

The cleanest test: put the SSD in another PC or another slot. If it appears there, the original slot, port, or cable is at fault. If it fails everywhere, the drive itself is the problem.

New SSDs ship with no partition and often no drive letter — so 'it doesn't show' is frequently just 'it needs initialising and a letter', not a failure. Check Disk Management before assuming anything is broken.