How to Copy Boot Drive to Another Drive (HDD or SSD) Safely

This is the ultimate guide to copying boot drive to another in Windows 7, 8, 10, and 11 without reinstalling Windows. You will get the cloning-related preparations, operating steps, and how to boot it up.


By Ivy Updated on February 29, 2024

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Why copy boot drive to a new drive?

Copying a boot drive to a new drive is a common practice in computer maintenance and upgrades. There are several reasons why you might want to do this:

  • Upgrade to a Larger Drive: If the existing boot drive is running out of space, you may want to copy it to a larger drive to expand storage.
  • Upgrade to a Faster Drive: If the current boot drive is old-fashioned, you may copy it to a newer, faster drive to improve performance.
  • Data Redundancy and Backup: Creating a copy of the boot drive serves as a form of backup. In case the original drive fails or becomes corrupted, having a duplicate drive ensures that you can quickly restore your system without losing data.

Copy Boot Drive to Another Drive

Can I transfer boot drive to another drive with built-in tool?

It's disappointed that Windows does not have a disk clone software to copy boot drive to another drive, whether HDD or SSD. Reinstalling Windows is complicated and time-consuming, and most users don't want to spend time on it. Indeed, this is something we often avoid doing. So, how to move boot drive to another drive without reinstalling Windows?

Fortunately, there is plenty of disk cloning software on the market that can do this, select one and follow its on-screen instructions. It will include the operating system and all the boot-related system files or drivers to ensure your computer can boot successfully. It also includes the installed programs and your personal data. 

AOMEI Backupper

We strongly recommend you use powerful cloning software - AOMEI Backupper Professional. Learn more >>

Make preparations for cloning a boot drive 

Before copying Windows boot drive to another drive, it's necessary to make some preparation to prevent potential disk issue and be sure the cloned drive is bootable. Below are some key points:  

1. Get a new HDD or SSD twice or three times bigger than the old boot drive. Otherwise, your disk may fill up quickly or fail to significantly improve performance. Worse, the cloned drive will be unbootable due to missing system files, hidden system reserved partition, or EFI partition.

2. Prepare a screwdriver and connector (if your computer has only one slot).  Usually, most HDDs use the SATA interface while SSDs may have different interfaces, such as SATA, M.2, PCIe, NVMe, etc. So please be sure your disk interface and prepare a compatible cable, adapter, or enclosure. 

M.2 SSD to USB Adapter

3. Install new HDD or SSD. If your computer has two slots, just slide your drive into the slot and screw it tightly. If your computer only has one slot, you need to connect your new HDD or SSD using a cable, adapter, or by putting it into a disk enclosure first. Then, connect the other side of the cable/adapter/enclosure to your computer via a USB port.

4. Initialize new drive. Go to Disk Management, right-click the new drive, and select Initialize Disk. Finally, select MBR or GPT partition style and click OK.




Please keep your new disk with the same disk partition style as the old one to avoid “the cloned drive not bootable after cloning” issue. To check the partition style of your current boot drive, go to Disk Management, right-click the boot drive, select Properties -> Volumes and see the information after Partition style.

Disk Partition Style

How to copy boot drive to new SSD or HDD safely

To move boot drive to another drive in Windows 11/10/8/7, you can use the “Disk Clone” feature of AOMEI Backupper Professional.

AOMEI Backupper
Easy Hard Drive and SSD Cloning Software
  • Clone HDDs/SSDs and MBR/GPT disk.
  • Clone hard drive with different size, such as clone smaller disk to larger disk or even clone larger HDD to smaller SSD.
  • Clone hard drive with different interfaces, such as clone NVMe to NVMe,clone M.2 SSD to M.2 SSD, etc
  • Optimize SSD disk performance through the "SSD Alignment" feature.

Let's have a closer look at the detailed steps to copy boot drive to new drive or SSD and here take Windows 10 as an example. 

Step 1. Launch disk cloning software - AOMEI Backupper Professional. Then, launch it, click Clone and Disk Clone to start the cloning process. 

Disk Clone

>> The Clone feature can only be demonstrated in the trial version. If you want to directly copy boot drive to new hard drive or SSD, please upgrade to the full version of AOMEI Backupper Professional.
>> If your new drive is a smaller SSD, try the "System Clone" feature in the Pro edition to only move boot partition in Windows 10 or 11.

Step 2. Select the boot drive containing the operating system as the source disk and click Next.

Select Disk

Step 3. Select the new HDD or SSD as destination disk and click Next.

Choose Destination Disk

Step 4. Confirm the operation and click Start Clone to clone boot drive in Windows 10. Click SSD Alignment to accelerate the reading and writing speed of SSDs. 

Start Clone

Note: Don't check the "Sector by sector clone" feature. It will clone all sectors of the disk to a larger one, whether used or not. In addition, the bad sectors are also included. 

👉 The highlight cloning feature

If your new hard drive or SSD is larger or has a different partition style than the old disk,  you may encounter the following two disk cloning issues. Click the "Edit Partitions" feature to resolve them completely. 

#1: The cloned drive not show full capacity.

By default, all the cloning software makes an exact copy of the source disk, as a result, the extra space will display as unallocated space in Disk Management. You may the clone drive does not show full capacity in File Explorer. Click the "Edit Partitions" feature and select "Add unused space to all partitions" or "Manually adjust partition size".

  • Copy without resizing partitions: It will not resize the partition size.
  • Add unused space to all partitions: It will reallocate the unallocated space to each partition of the target disk, appropriate for the disk size.
  • Manually adjust partition size: It allows you to extend unallocated space to any partition on the destination disk you want. 

Edit Partitions

#2: The cloned drive not bootable after cloning.

One of the biggest reason is the destination and source disk has different partition style and you don't convert them to the same before cloning. In this situation, you can simply check Convert the destination disk from MBR to GPT or vice versa in the "Edit Partitions" feature, depending on the disk partition styles of them. 

What to do after moving boot drive to another drive?

Sometimes, your computer will not boot from the target drive automatically, especially for a laptop. For a desktop, you can directly change boot order to set the boot priority for cloned disk, then it will boot.

But if you are using a laptop, you need to take out the old hard drive and install SSD on the location of your original hard drive. If you don’t switch the boot drive in Windows 11/10/8/7, it may boot from the original hard drive automatically. Then, set the cloned hard drive to the first boot option and boot from it.

Switch Boot Drive

• If your target disk has a different partition style as the source disk, and it's GPT, please change Legacy BIOS to UEFI, and vice versa.
• Don’t format the older boot disk until your computer can boot from the new drive. 
• If your HDD is still working well, you can use SSD for OS and HDD for storage. Therefore, you can enjoy the high performance of SSD and big capacity of HDD. 

In the end

With the help of best disk cloning software - AOMEI Backupper Professional, you can copy boot drive to another drive (HDD or SSD) in Windows 11/10/8/7 easily and quickly. This operation saves you much time and effort and you don't need to reinstall Windows from scratch.

With it, you can clone hard drive with different size, whether to larger HDD or smaller SSD, clone and resize hard drive, clone MBR disk to GPT without converting partition style and vice versa, clone dynamic disk in Windows 7, etc.

Also, this software is still powerful backup and restore software to protect your computer by its powerful backup solutions, such as, disk backup, incremental & differential backup, schedule backup, create bootable USB etc. Just download it to have a try right now!

Ivy · Editor
Ivy is an editor of AOMEI Technology, she covers backup & restore,hard disk & partitions management and cloud files transfer and so on for AOMEI. She is an outgoing girl and enjoys helping people find solutions to their problems. She loves traveling, eating, reading and so on. She usually hangs out with friends at her leisure time.