Bought a New SSD? How to Move Windows & Games Without Reinstalling

TL;DR (for non-geeks): Disk cloning sounds like sci-fi from Star Wars, but it's really just "Copy & Paste" on steroids. No magic involved, your old data is just moving to a bigger apartment.

The most common mistake after buying a new gaming SSD is thinking you have to block out your whole weekend to reconfigure your PC, look for Steam passwords, and download endless Windows updates. Fortunately, in 2026, you can take your entire drive and create an exact 1:1 copy of it. This process is called disk cloning.

Why is cloning better than reinstalling?

Comparison: Clean Install vs. Cloning

Clean Install

Takes 5-10 hours of active time
Must re-download hundreds of GBs of games
Lose logins and save game states
A fresh, bug-free system (the only advantage)

Cloning

Everything is done in 15-45 minutes
You won't notice a difference, all icons remain
Saves terabytes of internet data
Extremely easy even for beginners

What will you need?

Besides the old and new drives plugged into the computer simultaneously, you only need software. Most top SSD manufacturers (Samsung, Kingston, Crucial) include free software right in the box or for download on their website.

Got a Samsung? Download Samsung Data Migration. It's currently the best tool on the market, requiring only 3 clicks.
Different brand? Download Macrium Reflect Free (older version 8.0), or have AOMEI Partition Assistant or the manufacturer's tool (often a rebranded Acronis True Image) on hand.

Condition for Success: Connection

For cloning to work, the computer must see both drives at once. If you're swapping a drive in a laptop with only one M.2 slot, you must buy and use an external USB-C enclosure (M.2 external case) for a few dollars.

How to do it? (Step by Step)

The whole process is surprisingly straightforward. Let's go through an example using typical cloning software:

Install the new drive in the computer (or the external enclosure).
Open the cloning software and select "Clone this disk" on your current C: system drive.
Select your brand new drive as the Destination.
Crucial Step: If the new drive is larger, don't forget to click on the properties of the last partition in the program and drag it out to fill all the remaining free space of the new drive. Otherwise, you'll only have your original 500GB available on your new 2TB drive!
Start the process. The computer may restart. Let it work.

What happens after?

Once the program reports success, turn off the computer. Physically remove the old drive from the motherboard. Turn the computer on with only the new drive installed. Windows should immediately boot exactly as you left it, just with much more free space.

Don't know what to play next?

You have plenty of new space now. Plan out the list of games you'll install on it using our calculator.

Create Installation Plan

Preparation Before Cloning and Partition Alignment

Before you even dream of clicking the "Clone" button, doing a massive system cleanup is absolutely critical. Cloning transfers data sector by sector (or file by file); the less useless garbage you migrate, the faster the entire operation finishes, and the fewer errors you risk. Run Windows Disk Cleanup, empty the Recycle Bin, delete massive temp files, and ideally fully uninstall giant 150GB games-you can cleanly redownload them off Steam to your new drive later. This aggressive purge is highly recommended, especially if you are shrinking your storage footprint by moving from a bulky multi-terabyte HDD to a smaller capacity NVMe SSD.

Crucially, if you are migrating from an ancient magnetic hard drive (HDD) to a modern solid-state memory (SSD), you must ALWAYS check the "SSD Alignment" (or 4K alignment) option inside your cloning software! Modern SSDs possess an inherently different logical block structure compared to archaic HDDs. If you foolishly copy the sectors 1-to-1 and the drive misaligns the 4K operations, your brand-new lightning-fast drive will suffer devastating performance drops in random read/write speeds, drastically shortening its lifespan through amplified wear (Write Amplification). Professional tools like Macrium Reflect effortlessly handle this automatically.

How Do You Clone Onto a Much Smaller SSD?

This is a notoriously tricky but common problem: you own a sluggish 2TB HDD bloated with 800 GB of stuff, and you bought an ultra-fast 1TB NVMe SSD primarily for Windows. The OS itself only takes maybe 50 GB. How do you flip it over? First, you must aggressively offload massive static files (movies, giant zip archives, photos) onto a cloud backup or external USB backup drive until your total C: drive usage drops substantially below your new 1TB capacity limit. Good cloning software intelligently allows you to dynamically "shrink" the free space of the old primary partition in real-time, successfully funneling the bloated 2TB partition so it perfectly fits and functions natively inside the new 1TB SSD layout.

Fixing the Feared Post-Clone Boot Error

Occasionally, you finish the clone flawlessly, rip out the old drive, boot up proudly with only the new SSD, and BOOM-you get slammed with an "Operating System Not Found" error or the horrific Blue Screen INACCESSIBLE BOOT DEVICE. Do not panic! This happens simply because confused Windows registry paths or missing EFI/MBR boot records are stubbornly looking for the hardware ID of your old, now-missing drive.

The fix involves inserting a Windows installation USB stick, clicking "Repair your computer", launching the Command Prompt, and typing the classic holy trinity of boot repair commands: bootrec /fixmbr, followed by bootrec /fixboot, and finally completely reconstructing the boot configuration sequence via bootrec /rebuildbcd. After a swift restart, the system finally comprehends the massive hardware change and wonderfully boots your cloned Windows OS right up.