What Is the Best Format for Your External Hard Drive on Mac?

Whether you're setting up a new disk or trying to make an old one compatible, choosing the right file system can seem technical and confusing. However, selecting the best format for an external hard drive on your Mac is a critical step that impacts its performance, compatibility, and reliability. This guide simplifies the choices—APFS, Mac OS Extended (HFS+), and ExFAT—so you can confidently pick the perfect format for your specific needs.

File System Formats That Are Compatible With Mac

Although macOS is a closed-source operating system that doesn't play well with third-party files and formats, it still supports a few well-known file systems:

• HFS+ (Mac OS Extended Journaled): A Mac-specific file system, almost 25 years old, works on Mac OS, Mac OS X, and macOS; not supported natively on Windows/Linux (third-party software like Paragon HFS+ for Windows required).
• APFS (Apple File System): Introduced in 2017 with macOS High Sierra, optimized for SSDs and flash storage with speeds up to a few thousand MB/s; Mac-specific — the first choice to format an SSD for Mac.
• NTFS: Windows-based; macOS can only read NTFS natively — write support requires third-party software like Paragon NTFS for Mac. Excellent encryption and compression.
• FAT32: The most compatible format (Windows, Mac, Linux) but limited — no drives larger than 2 TB and no individual files larger than 4 GB.
• exFAT: Also known as FAT64; cross-compatible with Windows and Mac without FAT32's file-size limits — ideal for drives used across multiple modern operating systems.

Below is a detailed table comparison of the mentioned Mac file systems for your convenience:

Best Format for Cross-Platform Compatibility

If you're after a file system format that's compatible with more than just Macs, you have the following three options:

Therefore, it's evident that exFAT is the best cross-platform compatible file system unless you want to use the drive for Time Machine.

Best Format for Mac-Only Usage

Users who intend to use the external hard drive only for Mac should choose HFS+ or APFS — both are Mac-specific and offer better read/write speeds, encryption, and journaling than cross-platform formats.

Things to Consider Before Choosing the Best Mac External Hard Drive Format Type

Formatting a device isn't something you typically do constantly, as it wipes all data from it. Therefore, before doing it, you must consider a few factors that will influence your choice of a file system. A incompatible file may cause that Mac won't recognize external hard drive. After all, you won't be formatting all the time. Here are a few vital elements to consider:

1. Drive Support

The type of your external hard drive matters a lot and for a reason. APFS was created with solid-state drives in mind, which is why it works best with flash-based storage devices and newer Macs. Although it will work on hard disk drives and older devices, HFS+ is a better choice of file system in such cases. Moreover, APFS doesn't support Fusion drives, which some users might have.

2. How You Plan To Use the Drive

If your external hard drive is meant to work on Windows and Mac computers, APFS and HFS+ aren't the right choices. Instead, you should use file systems with cross-platform compatibility, like exFAT. Time Machine compatibility is also a vital factor, as not all file systems support it, and it will influence how you partition the external hard drive.

3. Mac Version

The version of Apple's operating system plays a significant role in choosing a file system for both internal and external drives. For example, if you own an older Mac computer with a macOS Sierra or a previous version, APFS can become problematic. For example, the relatively new file system has issues with encrypted volumes. On the other hand, the older HFS+ works on all versions of Mac OS X and macOS but has significant disadvantages mentioned above.

4. File Size

On top of the above factors, file size limits and encryption are also worth mentioning. For example, the FAT32 file system can't handle individual files larger than 4 GB and won't work well on hard drives larger than 2 TB.

How To Format Your External Hard Drive on Mac

Method 1. Set the Best Format For External Hard Drive on Mac Using Disk Utility

The easiest way to format an external hard drive on macOS is by using Disk Utility. Here's everything you should do:

1. Connect your external hard drive to the Mac.
2. Head into Applications > Utilities > Disk Utility.
3. Select your external hard drive on the left side and hit Erase at the top.

   

4. Name the device, choose the format, and hit Erase.

   

The formatting process only takes a few seconds, and your device will quickly be ready for files.

Method 2. Set the Best Format For External Hard Drive on Mac Using Terminal

The terminal command can be understood as the text input and output environment. It allows the users to enter commands for different computer processes. Hence, it facilitates the quick, easy, and accurate setting of the best format for external hard drive Mac. The detailed steps for the same are:

1. Connect the external hard drive to the Mac.
2. Launch Spotlight by pressing CMD + Space.
3. Type Terminal and press Enter.

   

4. Type diskutil list in Terminal to identify the external hard disk (for example: /dev/disk2).
5. Run the correct format command:

   sudo diskutil eraseDisk FAT32 MBRFormat /dev/disk2

6. Type diskutil list to confirm the formatting was done correctly.

Here,

• sudo is the user's right-click diskutil call command.
• eraseDisk FAT32 means format the disk to FAT32 and erase data.
• MBRFormat helps disk utility to utilize Master Boot Record to format.
• /dev/disk2 is the location of the external hard drive.

How To Recover Data From a Formatted External Drive on Mac

The formatting process deletes everything, wiping the drive clean and preparing it for future use. And since formatting hard drives is relatively easy, many users don't back up data beforehand, leading to data loss and deleted vital files.

Note: Formatting erases all data on the drive. Always back up important files to another healthy location before formatting — if you already formatted without a backup, stop writing to the drive and use mac data recovery software to scan it.

Fortunately, Wondershare Recoverit – Hard Drive Recovery can make our lives easier, as they can quickly and efficiently recover formatted hard drive on Mac. Namely, Recoverit has a 95% success rate and works in numerous situations. Whether you've accidentally deleted files, formatted a drive without backing up first, or experienced a system crash that wiped your data, Recoverit has your back.

The recovery process is incredibly intuitive. Here's what you need to do if you've formatted an external drive without a prior backup:

1. Download, install, and launch Wondershare Recoverit on your Mac.
2. Select Hard Drives and Locations on the left side and click on the external drive.

   

3. The scan begins automatically and takes a few minutes, depending on the size of your external drive.

   

4. Select and preview files while the scanning is happening. When you find the vital files or the scan completes, choose the files you wish to retrieve and hit Recover.

   

That's all you have to do. The process is straightforward and only takes a couple of minutes. On top of restoring files in situations where you've formatted the drive, the app will also work if malware and viruses, file transfer interruptions, or device power loss cause file deletion.

Conclusion

File systems determine how information is stored on a device. However, since various operating systems use different file systems, it's vital to format your storage devices according to your needs.

For an external hard drive, you can use a cross-platform compatible file system like NTFS, FAT32, and exFAT or Mac-only HFS+ or APFS if you intend to use the device exclusively on Mac machines.

Before formatting the device, it's vital to back up beforehand, as the process wipes all data off the device. However, in case you've already formatted the device without a backup, the only thing that can help is a data recovery app like Wondershare Recoverit.