USB Hard Drive Cloning with Macrium Reflect (Step-by-Step Guide)

What This Method Does

Macrium Reflect Rescue Media starts a separate Windows recovery environment from a USB flash drive. From there, Macrium can copy the partitions from the original system disk to another drive while the installed copy of Windows is not running.

When This Is a Good DIY Method

• Windows is reasonably stable and the source drive reads normally.
• You want to preserve installed programs, user accounts, settings, and files.
• The new drive is compatible with the computer.
• The required partitions and used data will fit on the destination.
• You can confidently distinguish the source drive from the destination.
• You are prepared to retain the original until the replacement has been tested.

If the source clicks, disappears, produces read errors, or causes repeated freezes, an ordinary clone may not be the safest first step. Review Recovering Data from a Failing Hard Drive before continuing.

What You Will Need

Before You Start

1. Check the source drive. Investigate disk warnings, unusual sounds, slow reads, freezes, or disappearing storage.
2. Confirm capacity. All required partitions and used data must fit within the destination’s usable space.
3. Confirm compatibility. SATA, M.2 SATA, and M.2 NVMe are different interfaces even when two drives appear similar.
4. Save the recovery key. Verify BitLocker or device-encryption status before making startup or storage changes.
5. Record the boot configuration. Note whether the computer uses UEFI or Legacy/CSM mode and whether Secure Boot is enabled.
6. Identify both physical drives. Write down each model and capacity.
7. Back up important files. A clone is a migration copy, not a replacement for an independent backup.

Step 1: Install Macrium Reflect

Install the current Macrium Reflect product on a working Windows computer. If you are using a trial, confirm that its current terms include the tools required for your intended clone and Rescue Media.

Open Reflect and allow any required components or updates to finish before building the USB. Macrium’s menus and wording can change between releases, so follow the labels displayed by your installed version.

Step 2: Create the Rescue USB

1. Insert the USB flash drive.
2. Open Macrium Reflect.
3. Open Other Tasks and select Create Rescue Media, or use the equivalent Rescue Media command in your version.
4. Select the supported Windows recovery environment recommended by Macrium for the computer.
5. Choose the correct USB device as the build destination.
6. Review any warnings concerning the USB’s existing contents.
7. Select Build and wait for Macrium to report completion.

Do not assume the media works merely because it was created. Test that it starts on the computer before depending on it for the cloning job.

Step 3: Test the Rescue USB

1. Leave the USB connected and restart the computer.
2. Open the manufacturer’s temporary boot menu.
3. Select the UEFI entry for the USB when the Windows installation and computer use UEFI.
4. Wait for the Macrium Rescue environment to load.
5. Confirm that Macrium can see the original system disk and the storage controller.

See the Boot Menu Keys guide for common HP, Dell, Lenovo, ASUS, Acer, and other shortcuts.

Step 4: Connect the Destination Drive

Shut the computer down and connect the replacement drive using a compatible internal slot, adapter, dock, or enclosure. Then start the Macrium Rescue USB again.

Confirm the model and capacity of the original and destination drives. The Rescue environment may assign different letters than Windows, but the physical models and capacities remain useful identifiers.

Step 5: Select the Source and Destination

1. Locate the original Windows system disk.
2. Select Clone this disk, or the equivalent cloning command.
3. Choose the new SSD, NVMe drive, or hard drive as the destination.
4. If the destination contains old partitions that you are certain can be erased, remove them within the proposed destination layout.
5. Copy or drag every required source partition to the destination.

The Windows partition is not always enough by itself. EFI, Microsoft Reserved, recovery, or system partitions may also be required. When in doubt, preserve the complete system-disk layout rather than copying only the visible C: partition.

Pause here: If you cannot confidently identify the original and replacement drives, cancel the operation before anything is overwritten.

Step 6: Adjust the Partition Layout

Step 7: Review and Run the Clone

Before selecting Finish, Run, or the equivalent command, verify:

• The source is the original drive containing the working Windows installation.
• The destination is the replacement drive that can be overwritten.
• All required startup and recovery partitions are included.
• The proposed Windows partition has an appropriate size.
• The destination layout is compatible with the intended startup mode.

Start the operation and do not disconnect either drive, remove power, or force the computer to restart. Cloning can take from minutes to hours depending on the data quantity, drive condition, connection speed, and destination.

Step 8: Install and Start from the New Drive

1. When Macrium reports completion, shut the computer down fully.
2. Remove the Rescue USB.
3. Install the replacement internally if it was connected externally.
4. Disconnect the original for the first test when doing so is safe and practical. This prevents confusion about which Windows installation starts.
5. Turn the computer on and select the new drive from the boot menu if necessary.
6. Allow Windows to detect the storage change and restart if requested.

Do not erase the original drive after the first successful startup. Keep it unchanged until you have completed the checks below.

Step 9: Verify the Clone

When to Stop the DIY Process

Stop if the source drive begins clicking, disappears, produces repeated read errors, or becomes dramatically slower. Also stop if the correct destination cannot be identified, Macrium does not detect the storage controller, required partitions are unclear, or the encryption recovery key is unavailable.

Repeated ordinary cloning attempts can place additional stress on a failing source. If the files matter more than preserving the exact Windows installation, recovery should take priority.

Macrium Reflect Cloning Questions

Related PCRuns Guides

Macrium’s products, licensing, interface, and Rescue Media options can change. Consult the official Macrium Reflect website and the documentation supplied with your installed version before starting.