A Step-by-Step Guide to Reformat an External Hard Drive

Sometimes, our external SSD is damaged by a power-off or virus attack, leading to a failure to open the disk. In that case, we have to reformat it to make the damaged configuration back to normal again. So, how should we do that? Can I keep the data while reformatting my external hard drives? This guide will show you some detailed steps to reformat an external hard drive, including Mac and Windows OS. Make yourself ready, and let’s go.

Reformat External Hard Drive

Part 1. Why I Need to Reformat My External Hard Drive

Reformatting an external hard drive is an indispensable process if you prepare it for a fresh start or eliminate an unsolvable malfunction. There are several reasons why reformatting is necessary.

• Choose a proper format

A new external hard drive is often unformatted or preformatted, which might not be compatible with your device. Reformatting allows you to select a proper disk format, such as NTFS, exFAT, or FAT32. These formats selection depends on your needs and the device you plan to use it with.

• Erase the data efficiently

Reformatting is relatively helpful when repurposing an old hard drive. It clears all existing data, removes unwanted files, and eliminates potential software conflicts, effectively giving the drive a fresh start.

• Fix malfunctions

If an external hard drive becomes corrupted, encounters errors, or slows down, formatting can handle these issues by erasing damaged sectors and restoring the drive to its original status.

• Make it operate in different OS

Reformatting is necessary when switching between operating systems. For example, if you’re moving from Windows to macOS, reformatting ensures compatibility between the external hard drive and the new system.

Part 2. How to Reformat an External Hard Drive on a Mac

Now, let’s take a look at the operation on the Mac. Here are the detailed steps:

Step 1.
Use a USB cable to plug your hard drive into your Mac. Some Macs may not have a USB port. In that case, you need a USB-C adapter.
Plug Your Disk
Step 2.
Find and open the Disk Utility app on your Mac.
Open The Disk Utility
Step 3.
Click View at the top and choose Show All Devices.
Choose Show All Devices
Step 4.
Select your external hard drive under the External and click Erase.
Click Erase Data
Step 5.
You can rename your hard drive and choose a new format here. After that, click Erase to reformat your external hard drive.
Erase The Data

Part 3. How to Reformat an External Hard Drive on Windows

Ok, after knowing the guide on Mac, let’s see how it works on Windows. This method is doable on both 10 and 11.

Step 1.
Get your hard drive connected to your PC using a USB cable.
Step 2.
Then, Open the File Explorer. Right-click your target hard drive and choose Format.
Choose Format
Step 3.
After that, choose a new File System format under the File system. Once finished, click Start.
Click Start Button

Part 4. Extension: How to Recover the Data When a Hard Drive is Reformatted

What if you regret after reforming your external hard drive or just forget to back up the data? Is there a way to get the data back? Of course, you can use data recovery tools like Aiseesoft Data Recovery, EaseUS, and GetDataBack to restore them. We will use Aiseesoft Data Recovery as an example this time.

Aiseesoft Data Recovery is a superb tool to recover photos, documents, videos, and emails, even after a complete reformat. Also, it offers two different modes which are Quick Scan and Deep Scan. For quick scans, the app will use AI to detect which files you usually access in daily life and skip those never-opened files. For deep scan, the app will scan all of the files on your computer no matter what it is. It will cost more time, but you might find some files that a quick scan cannot.

Moreover, with the help of AI, Aiseesoft Data Recovery is able to fix damaged images due to long-time deletion. Thus, you don’t have to look for and pay extra money for another app, thanks to Aiseesoft’s all-in-one data recovery tool.

Below are detailed steps.

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• 5 times faster than other data recovery tools using AI recognition

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• Recover your files with a 99.9% success rate

Step 1.
Connect your external hard drive and launch Aiseesoft Data Recovery. Then, choose your target hard drive and hit Start Scan. This progress may take a while.
Data Recovery Homepage
Step 2.
When it is finished, you can use the filter feature at the top to find your files quickly. After that, click Recover All.
Choose Files
Step 3.
Now, all of your files have been recovered. Click Open Folder to check their location.
Recover Success

Part 5. FAQs of Data Recovery

Will my data remain when I reformatted my external hard drive on a Mac?

No, when you reformat your external hard drive, all the data on it will be erased. But you can recover those deleted files from Mac using a data recovery tool like Aiseesoft Data Recovery.

What if I can’t find my external hard drive in File Explorer?

If your external hard drive is not showing up on windows, please check out if the connection is stable and the cable wire functions well.

Can I recover the lost data in the reformate progress?

Yes, you might use a third-party tool like Aiseesoft Data Recovery, EaseUS and GetDataBack to get your data back.

Conclusion

Today, we showed you the solution to reformat an external hard drive both on Mac and Windows. I hope you have learned how to deal with such a situation in the future. Meanwhile, there is also an excellent data recovery tool called Aiseesoft Data Recovery to restore your formatted data in no time!

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Aiseesoft Data Recovery is the best data recovery software to recover deleted/lost photos, documents, emails, audio, videos, etc. from your PC/Mac.

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