External hard drives are handy tools in storing files, data and documents. There are various reasons why you might need to format external hard drives. If you purchase an external hard drive as an addition to expand the storage space of your computer, most likely you would need to format it. More often than not, a lot of external hard drives are impacted by incurable virus infection. A lot of people would format their hard drives as soon as it is infected to avoid more damage. If there are errors or system failure where the external hard drives are not accessible, this would prompt for the action of formatting as well. This article will teach you how to format external hard drive for Mac and PC.
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Part 1. How to Format External Hard Drive on Mac
If you need to format your external hard drive, do not worry as you can do it as easy as the following steps:
The recent Western Digital 'easy store' and 'My Book' hard drives have a Mac Sierra 10.12.6 issue: They are invisible to the Desktop. WD Utilities says my two drives check out ok; Mac Utilities recognizes both hard drives. Going to the Mac Genius Bar on Monday. BestBuy sold me the original WD easystore 8T and WD sent me a My Book 8T. External hard drives are handy tools in storing files, data and documents. There are various reasons why you might need to format external hard drives.If you purchase an external hard drive as an addition to expand the storage space of your computer, most likely you would need to format it.
Step 1. Launch Disk Utility
After you have connected your external hard drive on you Mac, launch the 'Disk Utility' application which can be found under 'Applications'. Once the application is open, you would be able to see a list of available drives on the left side of the window. Identify and click the drive that you would like to format. Next, click the 'Erase' button on the top of the window. It is located next to 'First Aid' button.
Step 2. Choose the Format Option
In the 'Format' option, you can find that there are four options for formatting under its drop-down button. The 'Disk Utility' function will automatically choose 'Mac OS Extended (Journaled)' as the default format and this format is the most chosen format by users.
You can name your drive with any name that you like. You can change this at any point in time.
Step 3. Format the Drive
Finally, click the 'Erase' button at the bottom of the window and confirm it again at the next pop-up window. This action will begin the formatting of the external hard drive and erases everything in it. A progress bar will appear and will show you how long it will take to complete.
Part 2. The Steps for Formatting an External Hard Drive on Windows
If you are a Windows user, formatting an external hard drive on your Windows is as easy. Simply follow the following steps:
Step 1. Launch 'My Computer' and Choose 'Format'
After you have connected the external hard drive, launch 'My Computer' and you would be able to see the list of drives on the left side of the window or in the main window. Right click on your external hard drive and click Format.
Step 2. Format the External Hard Drive
Another window will pop-out. Simply click the 'Start' button and the formatting process will start and you are good to go!
Part 3. The Steps for Unformatting External Hard Drive on Mac and Windows Computer
I formatted my external hard drive on Mac by accident! The drive contains thousands of photos! Can I restore it back and retrieve my files again? Worry not, with Recoverit for Mac (or Recoverit for Windows) (macOS High Sierra supported), you can do just that and recover your precious photos and files. With powerful feature like the ease of use, flexible recovery settings and comprehensive 'Deep Scan' mode, the chances of recovering your formatted files are heightened!
Step by Step Guide to Unformat External Hard Drive
Step 1. Launch the Software
Connect the newly formatted external hard drive on your Mac computer. Once this is completed launch Recoverit. Next, simply choose the right file type tabs from the main window interface and click 'Next' button. This option will allow the quick and accurate retrieval of data from accidental reformatting activity.
Step 2. Choose the External Hard Drive
Select the hard drive that you have formatted after it has been detected by the software. If it does not detect your desired external hard drive, click the 'Refresh' icon on the right of 'External Removable Device'. Thereafter, click the 'Start' button at the bottom of the window to start scanning.
Step 3. Restore the Formatted Data
After scanning process is completed, a list of files that can be retrieved will be available for your preview. Highlight the file name and you should be able to see the content in the preview window. Once you are satisfied on which files you want, choose the files that you would like to recover by clicking on the boxes on the left side of the file names. Click 'Recover' in order to retrieve them back and save it to your desired folder. Remember to save it locally in your Mac or in another removable drive, not in the newly formatted external hard drive. If needed, you can do this later.
As you can see, it is really easy to recover files that you once thought to be gone forever. Thanks to Recoverit, you can now breathe a sigh of relief that this will never be the case in the future.
Related Articles & Tips
Erasing your disk: For most reasons to erase, including when reformatting a disk or selling, giving away, or trading in your Mac, you should erase your entire disk.
Erasing a volume on your disk: In other cases, such as when your disk contains multiple volumes (or partitions) and you don't want to erase them all, you can erase specific volumes on the disk.
Erasing a disk or volume permanently deletes all of its files. Before continuing, make sure that you have a backup of any files that you want to keep.
How to erase your disk
- Start up from macOS Recovery. Then select Disk Utility from the Utilities window and click Continue.
If you're not erasing the disk your Mac started up from, you don't need to start up from macOS Recovery: just open Disk Utility from the Utilities folder of your Applications folder. - Choose View > Show All Devices from the menu bar in Disk Utility. The sidebar now shows your disks (devices) and any containers and volumes within them. The disk your Mac started up from is at the top of the list. In this example, Apple SSD is the startup disk:
- Select the disk that you want to erase. Don't see your disk?
- Click Erase, then complete these items:
- Name: Type the name that you want the disk to have after you erase it.
- Format: Choose APFS or Mac OS Extended (Journaled). Disk Utility shows a compatible format by default.
- Scheme: Choose GUID Partition Map.
- Click Erase to begin erasing your disk and every container and volume within it. You might be asked to enter your Apple ID. Forgot your Apple ID?
- When done, quit Disk Utility.
- If you want your Mac to be able to start up from the disk you erased, reinstall macOS on the disk.
How to erase a volume on your disk
- Start up from macOS Recovery. Then select Disk Utility from the Utilities window and click Continue.
If you're not erasing the volume your Mac started up from, you don't need to start up from macOS Recovery: just open Disk Utility from the Utilities folder of your Applications folder. - In the sidebar of Disk Utility, select the volume that you want to erase. The volume your Mac started up from is named Macintosh HD, unless you changed its name. Don't see your volume?
- Click Erase, then complete these items:
- Name: Type the name that you want the volume to have after you erase it.
- Format: Choose APFS or Mac OS Extended (Journaled). Disk Utility shows a compatible format by default.
- If you see an Erase Volume Group button, the volume you selected is part of a volume group. In that case, you should erase the volume group. Otherwise, click Erase to erase just the selected volume. You might be asked to enter your Apple ID. Forgot your Apple ID?
- When done, quit Disk Utility.
- If you want your Mac to be able to start up from the volume you erased, reinstall macOS on that volume.
Reasons to erase
You can erase at any time, including in circumstances such as these:
- You want to permanently erase all content from your Mac and restore it to factory settings. This is one of the final steps before selling, giving away, or trading in your Mac.
- You're changing the format of a disk, such as from a PC format (FAT, ExFAT, or NTFS) to a Mac format (APFS or Mac OS Extended).
- You received a message that your disk isn't readable by this computer.
- You're trying to resolve a disk issue that Disk Utility can't repair.
- The macOS installer doesn't see your disk or can't install on it. For example, the installer might say that your disk isn't formatted correctly, isn't using a GUID partition scheme, contains a newer version of the operating system, or can't be used to start up your computer.
- The macOS installer says that you may not install to this volume because it is part of an Apple RAID.
About APFS and Mac OS Extended
Disk Utility in macOS High Sierra or later can erase using either the newer APFS (Apple File System) format or the older Mac OS Extended format, and it automatically chooses a compatible format for you.
How to choose between APFS and Mac OS Extended
How To Reformat My External Hard Drive For Macos Sierra Vista
Disk Utility tries to detect the type of storage and show the appropriate format in the Format menu. If it can't, it chooses Mac OS Extended, which works with all versions of macOS. If you want to change the format, answer these questions:
- Are you formatting the disk that came built into your Mac?
If the built-in disk came APFS-formatted, Disk Utility suggests APFS. Don't change it to Mac OS Extended. - Are you about to install macOS High Sierra or later for the first time on the disk?
If you need to erase your disk before installing High Sierra or later for the first time on that disk, choose Mac OS Extended (Journaled). During installation, the macOS installer decides whether to automatically convert to APFS—without erasing your files. - Are you preparing a Time Machine backup disk or bootable installer?
Choose Mac OS Extended (Journaled) for any disk that you plan to use as a Time Machine backup disk or as a bootable installer. - Will you be using the disk with another Mac?
If the other Mac isn't using macOS High Sierra or later, choose Mac OS Extended (Journaled). Earlier versions of macOS don't work with APFS-formatted volumes.
How to identify the format currently in use
External Hard Drive For Mac
If you want to know which format is currently in use, use any of these methods:
- Select the volume in the Disk Utility sidebar, then check the information shown on the right. For more detail, choose File > Get Info from the Disk Utility menu bar.
- Open System Information and select Storage in the sidebar. The File System column on the right shows the format of each volume.
- Select the volume in the Finder, then choose File > Get Info from the menu bar. The Get Info window shows the Format of that volume.
If your disk or volume doesn't appear, or the erase fails
![How to reformat my external hard drive for macos sierra vista How to reformat my external hard drive for macos sierra vista](/uploads/1/2/6/5/126555550/638419062.png)
- Shut down your Mac, then unplug all nonessential devices from your Mac.
- If you're erasing an external drive, make sure that it's connected directly to your Mac using a cable that you know is good. Then turn the drive off and back on.
- If your disk or volume still doesn't appear in Disk Utility, or Disk Utility reports that the erase process failed, your disk or Mac might need service. If you need help, please contact Apple Support.
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- If you can't start up from macOS Recovery, you can use a different startup disk instead.
- If Disk Utility shows a Security Options button in the Erase window, you can click that button to choose between a faster (but less secure) erase and a slower (but more secure) erase. Some older versions of Disk Utility offer the option to zero all data instead. These secure-erase options aren't offered or needed for solid-state drives (SSDs) and flash storage.