Pro tip: If your external drive has a large volume, like mine — a 2TB Seagate Expansion. I highly recommend you also create multiple partitions.
- Pick the right file system for your Mac’s internal or external storage.
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When I opened it, the default content was all there. It showed this format:. What is NTFS? The tutorial and screenshots below are based on macOS Sierra They might be different if your Mac has a different version.
How to Format or Partition an External Hard Drive for Mac
Make sure your drive is connected. Select the one shown below. Learn more about the differences between these file systems from this thread. You can also check to see if the format was successful.
Disk Utility for macOS Sierra: Erase a volume using Disk Utility
Now your external drive has been formatted to be fully compatible with Apple MacOS, and you can edit, read, and write files to it as you want. Open the Disk Utility app and highlight your external hard drive. If you select the one below it, the Partition option will be greyed out and become unclickable.
Located on the left is a big blue circle with the name of your external drive together with its volume size.
Format an External Hard Drive or USB Flash Drive for Mac OS X
Then allocate the desired volume to each partition. You can do that by clicking the small white circle and dragging it around.
To check whether the operation is really successful, go to your Mac desktop. You should see multiple disk icons show up. However, this isn't your only choice.
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- How to Format or Partition an External Hard Drive for Mac.
- What’s the Difference Between APFS, Mac OS Extended (HFS+), and ExFAT?.
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Depending on the partition scheme, these are the file systems Mac OS I've lost a lot of data because the FAT file system on a FireWire drive got corrupt after I accidentally turned off the drive while it was in use. After this, newer files started overwriting older ones, but I didn't find out until a month later. And don't format or partition an iPod using Disk Utility, because the iPod gets confused, even though it will function as an external drive.
In addition to the file systems listed above that you can use to format your drives with, Mac OS X has various levels of support for the following file systems:. And you may want to start reading up on ZFS, Sun's revolutionary new file system that is supposed to come to the Mac with Leopard.
Mac OS Extended: Best for Mechanical Drives, Or Drives Used With Older macOS Versions
You must login or create an account to comment. Skip to main content When you put a new hard drive in your Mac—or connect an external one using FireWire or USB—you need to decide how to partition the drive and what file system to put on it.
There are three choices: Apple Partition Map: WD External Drives. External Drives for Mac. AlCapone The formatting decides the way the files are stored on your hard disk. However, You may wish to continue as you are, and ignore this message. Your choice.
How to Format an External Drive to Work with Mac (from NTFS to Mac OS Extended)?
To reformat: Save your data use Disk Utility, select your disk, and use the Partition Tab. If you want to know more about the subject: Choose the Partition tab above the main winsdow pane. Safe Boot Procedure: This procedure rebuilds the directory.
Restart computer. Disk Warrior: I then open and run DiskWarrior on all my disks, internal and external. Run disk Warrior on all disks to build replacement directories. Backward Compatible Journaled file system is part of a set of incremental enhancements to the Mac OS Extended file system, and it is backward compatible with the Mac OS Extended file system.