Should I mirror my hard drive?

For this process, you'll obviously need two drives: the source drive (with the data you want to clone), and thedestination drive(where you're cloning that datato). If you have a desktop computer and both drives are installed internally (or you're just cloning to a USB external drive for backup), great! You're ready to continue.

If, however, you're using a laptop with only one drive bay, you'll need an external SATA-to-USBadapter,dock, orenclosureto connect your bare drive to the computer. Once you've connected your drive, you can go through the cloning process, then disconnect it and install the drive internally.

In most cases, your destination drive will probably need to be as large as, or larger than, your source drive. If it isn't, you'll need tofree up spaceon your source drive andshrink the main partition downto fit. (You'll probably only need to do this if you're migrating from a hard drive to a smaller SSD; we have a separate guide on that process here.)

Windows users have lots of great cloning tools available, but we'll be usingMacrium Reflect Free. It's free, easy to use, and widely loved by many, so it's hard to go wrong.

To install Macrium Reflect, download the Home Use installer and start it up. It's just a tiny tool that will download the actual installer for you, based on the type of license you want. Choose the temporary folder for these filesI just put them in my Downloads folderand click the Download button.

Once it's finished, it'll automatically launch the Macrium installation wizard, which you can click right on throughthe default options should be fine for our purposes. You can safely delete all the installer files from your Downloads folder once the wizard has finished.

Open Macrium Reflect and you'll see a detailed list of the disks connected to your computer. You have two main options: you can directly clone one disk to another, or create an image of a disk. Cloning allows you to boot from the second disk, which is great for migrating from one drive to another. Imaging, on the other hand, allows you to store as many full, one-to-one copies of your source disk as the destination's space will allow, which is useful for backups.

Select the disk you want to copy (making sure to check the leftmost box if your disk has multiple partitions) and click "Clone This Disk" or "Image This Disk."

In the next window, choose your destination diskthe one that will house your newly copied data. Note that this will erase all data on the disk, so be careful which one you choose. If there's any old data on it, you may want to select it and click the "Delete Existing Partitions" button until the drive is empty.

If you're cloning to a larger drive, you'll want to click the "Cloned Partition Properties" button at the bottom of this window, and extend your main partition to fill up the entire space of the disk.

The next page will ask if you want to schedule this clone, which is useful if you want to regularly image your drive for backup purposes. I've skipped this, since I'm just doing a one-time clone. On the page after that, you can also save the backup and its schedule as an XML file for safe keeping, but I've unchecked that option for the same reasonI'm only doing this once for now.

Finally, Macrium Reflect will begin the cloning process. This can take some time depending on the size of your drive, so give it time to do its thing. If you cloned your drive, you should be able to boot from it now by selecting it in your BIOS. If you're imaging your drive, you can actually keep the second drive connected for future image backups.

If you're on a Mac, we recommendSuperDuperfor all your cloning needs. It's free, simple to use, and has been around for years. Download the app, open the DMG file, and double-click on the icon to install. (Don't drag it to your /Applications folder like you would most Mac apps; double-clicking on it should install it to your computer.)

Once installed, open SuperDuper and you'll be greeted with its incredibly simple, intuitive interface. In the first menu next to "Copy," select the source disk you want to clone. In the second menu, select the destination disk you're cloning tothis will fully erase the drive in that second menu, so make sure there isn't anything important on it! When you're ready, click the "Copy Now" button. The process will begin. (Yeah, it's that easy.)

This may take a while, but when it's done, you have two choices. If you want to replace your Mac's internal drive with the new drive (say, if you're migrating to a larger drive), you can open up your Mac and swap those now, then boot up as normal.

If you want to boot your cloned drive from USB, you can hold the Option key as your Mac starts up and select it from the boot list. Your cloned drive will be in the exact state your computer was during the cloning process, and you can continue working without skipping a beat.