How to Upgrade Your Laptop SSD — A Step-by-Step Guide

Upgrading a laptop SSD is one of the highest-value hardware jobs you can do yourself. A slow or small drive holds everything else back — even a fast processor sits waiting on storage. The job is not complicated, but there are a few places where people make mistakes that cost them time or data. Follow this in order and you will avoid them.

Step 1 — Back Up Before You Touch Anything

This is not optional. Even if you plan a clean Windows install on the new drive, back up first. You want your data, your browser profiles, your files, in a safe place before the old drive comes out.

Option A: Macrium Reflect (Recommended for Clone)

Macrium Reflect Free lets you create a clone of your existing drive onto the new SSD, so you boot directly into your existing Windows install without reinstalling anything.

Download and install Macrium Reflect Free from macrium.com
Connect your new SSD via a USB-to-M.2 or USB-to-SATA adapter — these are inexpensive and reusable
Open Macrium, select Clone this disk under your current drive
Choose the new SSD as the destination
Let it run — this takes 20 minutes to a few hours depending on how much data you have
Verify the clone completed without errors before proceeding

If your new SSD is smaller than your current one, Macrium will ask you to shrink partitions to fit. This works, but make sure you have enough room for your Windows install and your data.

Option B: Windows Backup

If you just want your files and are planning a fresh Windows install, use Windows Backup (Settings > Accounts > Windows Backup) or simply copy important folders to an external drive or OneDrive. A clean install is a reasonable choice if the laptop has been running for years and has accumulated junk.

Step 2 — Identify Your Current Drive and Slot Type

Before buying anything, you need to know what you are replacing and what will fit.

Using Software First

Open CPU-Z (cpuid.com) or HWiNFO64 (hwinfo.com) and look at the storage section. Both tools will show your current drive’s model number. Search that model number online and you will get the exact specifications: interface (NVMe or SATA), form factor, and manufacturer.

In Windows, you can also open Device Manager > Disk Drives to see the drive model, then look it up.

Physical Inspection

The most reliable method is opening the laptop and looking directly at the drive. Most laptops have a single bottom panel held by Phillips screws. Remove it carefully — some have clips along the edge in addition to screws. Use a plastic spudger, not a screwdriver, on the clips.

Once inside, locate the M.2 slot. The drive will be a small rectangular board secured by a single screw. Note the length.

Understanding Form Factors

M.2 drives come in different lengths. The number after “M.2” tells you the width and length in millimeters:

2230 — 22mm wide, 30mm long (common in Microsoft Surface, newer thin laptops, and some Steam Deck-era mini PCs)
2242 — 22mm wide, 42mm long (less common, shows up in some budget laptops)
2280 — 22mm wide, 80mm long — the standard size you see in most laptops and desktops

Installing a 2280 into a slot designed for 2230 will not work physically. The screw hole will not line up and the drive may not seat fully. Get the right length.

NVMe vs. SATA — the Interface Question

M.2 is a physical form factor, not an interface. An M.2 slot can carry either NVMe (faster, uses PCIe lanes) or SATA (slower, backward-compatible interface).

Check your laptop’s manual or the motherboard specifications before buying. Some laptops only support M.2 SATA. Buying an NVMe drive for a SATA-only slot means it will not be detected.

If your laptop uses a 2.5-inch bay instead of M.2, you need a 2.5-inch SATA SSD, not an M.2 at all. Older laptops and budget machines often use this configuration.

To confirm which interface your slot supports, search your laptop model plus “M.2 interface” or check the manufacturer’s specs page.

Step 3 — Buy the Right Replacement Drive

With the form factor and interface confirmed, pick your drive.

For NVMe, the Samsung 990 Pro, WD Black SN850X, and Crucial P3 Plus are all solid options depending on your budget and whether you need top-tier sequential speeds or just a reliable daily driver. For SATA, the Samsung 870 EVO and Crucial MX500 are reliable standards.

For most laptop use, a mid-range NVMe in your correct form factor is the right call. Do not overspend on an 990 Pro for email and document work — the practical difference at those workloads is minimal. Do spend a few extra dollars on a name-brand drive over no-name options. SSD failures happen, and they tend to happen without much warning.

Capacity: if your current drive is nearly full, go at least 50% larger. Storage that is 90% full degrades performance noticeably.

Step 4 — Physical Installation

Tools You Need

Small Phillips-head screwdriver (JIS #0 or #1 for Japanese laptops — Phillips will strip these)
Plastic spudger or opening pick
Antistatic precautions — touch a grounded metal surface before handling the drive

The Process

Power off the laptop completely. Do not just close the lid.
Disconnect the power adapter.
Remove the bottom panel screws — keep them organized (a piece of tape with labeled sections works well).
If the battery has a disconnect connector on the motherboard, unplug it before touching anything else.
Locate the M.2 slot. Remove the single retention screw.
The old drive will lift up at a slight angle — about 30 degrees. Pull it straight out from the connector.
Insert the new drive at the same angle, sliding it firmly into the M.2 connector. It should seat without forcing.
Press it flat and replace the retention screw. Snug but not overtightened — these screws strip easily.
Reconnect the battery connector if you unplugged it.
Replace the bottom panel and screws.

Some laptops have a thermal pad between the SSD and the chassis for heat dissipation. If the old drive had one attached, transfer it to the new drive or replace it. Leaving it out is not catastrophic for SATA drives, but NVMe drives run hotter and benefit from thermal management.

Step 5 — Verify in BIOS Post-Install

Before booting into Windows (or your clone), enter the BIOS. The method varies by laptop — usually F2, F10, Del, or Escape at the manufacturer logo.

Look for a storage or boot device section. Your new SSD should appear listed. If it does not show up, the drive is not fully seated. Power off, open the panel again, and reseat it.

If the drive shows but Windows will not boot, the clone may not have been set as the active boot drive. In that case, proceed to a clean install.

Step 6 — Restore or Do a Clean Install

If You Cloned

If you cloned with Macrium, your laptop should boot directly into Windows. The first boot may take slightly longer as Windows adjusts to the new drive. Let it complete without interrupting.

Open Disk Management (right-click Start > Disk Management) and check that your new drive shows the correct total size. If there is unallocated space at the end — common when cloning to a larger drive — right-click the Windows partition and select Extend Volume to use the remaining space.

If You Are Doing a Clean Install

Download the Windows 11 Media Creation Tool from Microsoft, create a bootable USB drive (8GB or larger), boot from it, and install Windows fresh on the new drive. During setup, you will format the new drive as part of the process.

After a clean install, reinstall your applications and restore your files from the backup you made in Step 1. This takes more time upfront but results in a clean system without accumulated cruft.

Final Check

Once you are in Windows, open Task Manager > Performance > Disk to confirm the new drive is showing the correct capacity. Run a quick benchmark with CrystalDiskMark (free, from crystalmark.info) to verify read and write speeds are in the expected range for your drive. An NVMe drive showing 500 MB/s sequential read instead of 3500+ MB/s is a sign it may be running in SATA mode due to a slot compatibility issue.

A successful SSD upgrade is one of the most satisfying laptop repairs — the difference in boot time and general snappiness is immediately obvious.