On Windows 10, whenever you get a new hard drive, it's important to format it before you start dumping files. The reason is that you want to ensure that the drive is working correctly, completely clean, and free of malware or malicious code that may harm your installation and personal files.
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Install the NEW hard drive back into Mac. Before you do this, there are a couple of screw-in pins that are in the sides of the old hard drive that you will need to hold your new hard drive in place. Use the T8 mini Torx screwdriver to remove them and place them into the sides of the new drive. These will hold your new drive.
- Jul 18, 2013 After purchasing a new hard drive or managing a corrupt one on an older Mac, you can install your current version of OS X even though you might not have a working Recovery option (on the drive.
- Jan 17, 2019 Right-click the new hard drive and select the Format option. In the 'Value label' field, type a descriptive name for the drive. Use the 'File system' drop-down menu, and select NTFS (recommended.
- Mar 20, 2018 Put the new drive into the caddie, and then slide it into place on the case (and secure it if necessary). Now, plug the cables into the new drive. It’s easy to figure out—they only fit one way. If you’re adding a new hard drive and leaving the old one in place, it’s a bit more complicated.
And it's not just a good practice for new drives, but for used hard drives too (especially those previously connected to a different OS), as using the proper formatting, you can avoid issues and compatibility problems.
Basically, when you format a hard drive, you're deleting all the data residing on the storage, and you start clean with a compatible file system (including NTFS, FAT32, or exFAT), which in this case Windows 10 understands to read and write data.
There are many methods available to format a hard drive, but using Disk Management could be considered one of the best options for most users.
In this Windows 10 guide, we'll walk you through the steps to correctly format a traditional hard drive or Solid-State Drive (SSD), whether it already has a partition or it was never initialized.
How to format existing partition using Disk Management
If you have a hard drive already configured with a partition, you can just format the existing partition to erase its content and start fresh with a clean drive.
To format a partition using Disk Management, use these steps:
- Open Start.
- Search for Disk Management and click the top result to open the experience.
- Right-click the new hard drive and select the Format option.
- In the 'Value label' field, type a descriptive name for the drive.
- Use the 'File system' drop-down menu, and select NTFS (recommended for Windows 10).
- Use the 'Allocation unit size' drop-down menu, and select the Default option.
- Check the Perform a quick format option.Quick Tip: While performing a quick format wipes the drive faster, it doesn't check if the drive is damaged. On the other hand, when clearing the option, a full format will be performed, which not only wipes the drive clean, but it'll also check for bad sectors. It's an option that could take several hours, but it's a good practice to make sure the hard drive is in working conditions.
- Unless necessary, clear the Enable file and folder compression option.
- Click the OK button.
- Click the OK button again in the warning message.
Once you've completed the steps, the system will format the selected partition on the drive, and then you can start using it to store files.
How to create and format new partition using Disk Management
If you happen to have a hard drive that was never formatted, you'll need to initialize and create a new partition before you can format it.
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Typically, you'll know when a hard drive doesn't have a partition, because it'll not appear in File Explorer, and on Disk Management, it'll appear as unallocated space.
To properly set up a blank hard drive, use these steps:
- Open Start.
- Search for Disk Management and click the top result to open the experience.
- Right-click the hard drive marked as 'Unknown' and 'Not Initialized,' and select Initialize Disk.
- Check the disk to initialize.
- Select the partition style:
- Master Boot Record (MBR) for hard drives smaller than 2TB in size.
- GUID Partition Table (GPT) for hard drives larger than 2TB in size.
- Click the OK button.
- Right-click the Unallocated space, and select the New Simply Value option.
- Click the Next button.
- Under the 'Simple volume size in MB' section, leave the default size if you're planning to use the entire hard drive to store files. Otherwise, specify the amount of space in megabytes that you want to allocate for the partition.
- Click the Next button.
- Use the 'Assign the following drive letter' drop-down menu to select a letter for the new hard drive.
- Click the Next button.
- Use the 'File system' drop-down menu, and select NTFS (recommended for Windows 10).
- Use the 'Allocation unit size' drop-down menu, and select the Default option.
- In the 'Value label' field, type a descriptive name for the drive.
- Check the Perform a quick format option.Quick Tip: If you prefer a full format, clear the quick format option. Just keep in mind that depending on the size of the drive, it can take hours to finish.
- Unless necessary, clear the Enable file and folder compression option.
- Click the Next button.
- Click the Finish button.
After completing the steps, the new hard drive will be initialized, partitioned, and properly formatted.
If you're having trouble using Disk Management to format a hard drive, because of data corruption or other severe issues, you can use the DiskPart command-line tool to fix the problem.
While we're focusing this guide on Windows 10, the steps outlined above will also work on Windows 8.1 and Windows 7.
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More Windows 10 resources
For more helpful articles, coverage, and answers to common questions about Windows 10, visit the following resources:
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Reinstall from macOS Recovery
macOS Recovery makes it easy to reinstall the Mac operating system, even if you need to erase your startup disk first. All you need is a connection to the Internet. If a wireless network is available, you can choose it from the Wi-Fi menu , which is also available in macOS Recovery.
1. Start up from macOS Recovery
To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following sets of keys on your keyboard. Release the keys when you see an Apple logo, spinning globe, or other startup screen.
Command (⌘)-R
Reinstall the latest macOS that was installed on your Mac (recommended).
Option-⌘-R
Upgrade to the latest macOS that is compatible with your Mac.
Shift-Option-⌘-R
Reinstall the macOS that came with your Mac, or the closest version still available.
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You might be prompted to enter a password, such as a firmware password or the password of a user who is an administrator of this Mac. Enter the requested password to continue.
When you see the utilities window, you have started up from macOS Recovery.
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2. Decide whether to erase (format) your disk
You probably don't need to erase, unless you're selling, trading in, or giving away your Mac, or you have an issue that requires you to erase. If you need to erase before installing macOS, select Disk Utility from the Utilities window, then click Continue. Learn more about when and how to erase.
3. Install macOS
When you're ready to reinstall macOS, choose Reinstall macOS from the Utilities window. Then click Continue and follow the onscreen instructions. You will be asked to choose a disk on which to install.
- If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
- If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first.
- If the installer is for a different version of macOS than you expected, learn about macOS Recovery exceptions.
- If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD.
Please allow installation to complete without putting your Mac to sleep or closing its lid. During installation, your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.
If your Mac restarts to a setup assistant, but you're selling, trading in, or giving away your Mac, press Command-Q to quit the assistant without completing setup. Then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup.
macOS Recovery exceptions
The version of macOS offered by macOS Recovery might vary in some cases:
- If macOS Sierra 10.12.4 or later has never been installed on this Mac, Option-Command-R installs the macOS that came with your Mac, or the closest version still available. And Shift-Option-Command-R isn't available.
- If you erased your entire disk instead of just the startup volume on that disk, macOS Recovery might offer only the macOS that came with your Mac, or the closest version still available. You can upgrade to a later version afterward.
- If your Mac has the Apple T2 Security Chip and you never installed a macOS update, Option-Command-R installs the latest macOS that was installed on your Mac.
- If you just had your Mac logic board replaced during a repair, macOS Recovery might offer only the latest macOS that is compatible with your Mac.
If you can't get macOS Recovery to offer the installer you want, you might be able to use one of the other ways to install macOS.
Other ways to install macOS
- You can also install macOS from the App Store or Software Update preferences. If you can't install macOS Catalina, you might be able to install an earlier macOS, such as macOS Mojave, High Sierra, Sierra, El Capitan, or Yosemite.
- Or create a bootable installer disk, then use that disk to install macOS on your Mac or another Mac.