How to install an SSD

By: The SSD Lab Team · Team

Published: Updated:

This guide summarises common desktop installation steps and Microsoft’s Disk Management instructions. Your motherboard, case and laptop service manual take priority. PlayStation 5: do not follow this page — use Sony’s PS5 M.2 SSD guide (PCIe Gen4 x4 NVMe, cooling structure, no M.2 SATA).

Before you start

  1. Match the drive to a free interface. Check the board manual for M.2 slots (NVMe and/or SATA, length such as 2280) and for 2.5-inch bays with SATA data + power. M.2 is a form factor; NVMe is a protocol — see What is NVMe? and NVMe vs SATA.
  2. Back up if you are replacing a drive that holds data.
  3. Tools. Usually a Phillips screwdriver. Anti-static: touch grounded metal before handling the drive or board.
  4. Power off and unplug the PC before opening the case.

Desktop: install an M.2 SSD

  1. Power down, unplug the PSU cable, open the side panel.
  2. Locate the M.2 slot. If the board has an M.2 heatsink, remove its screw(s) and lift it off.
  3. Insert the SSD into the slot at a slight upward angle until the edge connector is fully seated, then press the drive flat and secure it with the standoff screw or retention clip your board uses.
  4. Refit any heatsink or thermal pad the manual specifies.
  5. Close the case and reconnect power.

Exact screw positions and which M.2 slots share bandwidth with SATA ports or PCIe slots vary by board — follow the motherboard manual for that model.

Desktop: install a 2.5-inch SATA SSD

  1. Mount the SSD in a 2.5-inch bay or adapter tray with the screws supplied for your case.
  2. Connect a SATA data cable from a motherboard SATA port to the drive.
  3. Connect a SATA power cable from the power supply to the drive.
  4. Close the case and reconnect power.

SATA SSDs use the same cables as SATA hard drives. Rated sequential speeds are typically about 560 MB/s because of the SATA 6 Gb/s link (SATA-IO Revision 3.0; example datasheet: Samsung 870 EVO).

Set up the new disk in Windows

A blank SSD does not appear with a drive letter until Windows initialises and formats it. Microsoft’s steps (Initialize new disks):

  1. Open Disk Management with Administrator permissions (Start → search “Create and format hard disk partitions” → Run as administrator).
  2. If the disk shows as Offline, right-click it → Online.
  3. Right-click the disk → Initialize Disk. The default partition style is GPT (GUID Partition Table), which Microsoft recommends for modern SSDs and for volumes larger than 2 TB.
  4. Right-click the unallocated space → New Simple Volume and finish the wizard (size, drive letter, usually NTFS).

Warning from Microsoft: initialising a disk that already holds data erases that data — back up first.

If you are moving Windows itself onto the new SSD, you need cloning software or a clean Windows install; Disk Management alone does not migrate the system partition.

Laptops

Whether a laptop SSD is replaceable, which M.2 length fits, and how to open the chassis are model-specific. Use the manufacturer’s service or maintenance guide for that exact model. Opening some devices can affect warranty — check the maker’s policy first. This page stays on desktop M.2 / 2.5-inch SATA plus Windows setup.

FAQ

PS5 install? Follow Sony’s official guide (PCIe Gen4 x4 NVMe, cooling structure, no M.2 SATA). A dedicated Lab how-to for the console will live under /gaming/ once written; this page stays desktop-only.

Drive not showing in Windows? Confirm cables/seat, then use Disk Management as above. Microsoft documents troubleshooting for disks that are missing or not initialised on the same learn.microsoft.com article family.

NVMe or SATA for a second drive? Whichever free interface you have; comparison: NVMe vs SATA.