Oct 27, 2017 - How to Format or Partition an External Hard Drive for Mac. That's all because it's been initialized with Windows NT File System (NTFS), which. The best ways to format an external drive for Windows and Mac. Compare the different options for formatting an external hard drive to work with Windows and Mac. And, no: the answer isn't always FAT32.
Windows can’t normally read Mac-formatted drives, and will offer to erase them instead. But third-party tools fill the gap and provide access to drives formatted with Apple’s HFS+ file system on Windows.
This also allows you to. If you know you’re going to use a drive on both Mac and Windows, you should use the exFAT file system, which is compatible with both.
But if you didn’t foresee that, you may have formatted your drive with Apple’s HFS Plus, which Windows can’t read by default. In fact, some manufacturers sell “Mac” drives pre-formatted with this Mac-only file system. Don’t Format the Drive! (Yet) When you connect a Mac-formatted drive to Windows, you’ll be informed that “you need to format the disk in drive X: before you can use it.” Don’t click the “Format disk” button or Windows will erase the contents of the drive–click “Cancel”! This message appears because Windows doesn’t understand Apple’s HFS+ file system.
That’s fine, because other applications do. Just don’t format the drive until you get the important files off the drive. Of course, if the drive doesn’t have any important files on it, you can go ahead and format it. But be absolutely sure there’s nothing you need before you do. Option One: HFSExplorer Is Free and Basic RELATED: If you only need to get a couple files off the drive, we recommend. It’s the only completely free way to access a Mac-formatted drive.
It does require, however, so you’ll have to. Then, install HFSExplorer like you would any other Windows program.
HFSExplorer isn’t fancy, though, and doesn’t have a lot of features. You can’t use it to write to Mac-formatted drives, and it doesn’t install a file system driver that integrates into File Explorer. But you can open HFSExplorer, read a Mac-formatted drive, and copy the files to your Windows PC without paying a dime. It can also mount Mac.dmg disk images to get at the files inside them. This application’s read-only nature isn’t necessarily a bad thing. It ensures that no bug in the third-party driver can damage your Mac-formatted drive and the files on it.
You can set read-only mode in other applications, too–but, if you’re not going to use their write support, there’s less reason to pay for them. To use HFSExplorer, connect your Mac-formatted drive to your Windows PC and launch HFSExplorer. Click the “File” menu and select “Load File System From Device.” It will automatically locate the connected drive, and you can load it. You’ll see the contents of the HFS+ drive in the graphical window. Just select the files or folders you want, click “Extract,” and choose a folder. They’ll be copied to the location you choose on your PC. Option Two: Paragon HFS+ is $20, But Offers Write Access and Better Integration Paragon’s is a bit fancier, but it’ll cost you.
This tool installs a file system driver that allows you to access a Mac-formatted drive like any other drive in File Explorer, or any other Windows application with an open or save dialog. It boasts improved speed, and we wouldn’t be surprised if it were faster than HFSExplorer. And, unlike HFSExplorer, it offers full read/write access to Mac-formatted drives, so you can write to them from within Windows. Just install it, and Mac drives will show up like any other drive.
If you need to work with Mac-formatted drives on a regular basis and you want the operating system integration, speed, and write access, Paragon HFS+ is a great choice and will be worth it for you. But, if you just need to get some files off a Mac-formatted drive occasionally, this is overkill and you can save $20 by sticking with HFSExplorer. Paragon does offer a 10-day free trial of HFS+ for Windows, so you can give it a try and see if it works for you.
And, if you just need to get files off of a Mac-formatted drive once, you can just use the trial and be done with the application by the time it expires. Option Three: Mediafour MacDrive Costs $50 to $70, But Includes More Features Mediafour’s is similar to Paragon’s HFS+ for Windows, but with more features and polish.
It’s noticeably more expensive than Paragon HFS+ too, at $50 for the Standard version and $70 for the Pro version. For most people, this software won’t really be worth it. But it offers a few unique features, like support for Mac-formatted RAID disks. It also offers a graphical interface with support for verifying, repairing, and formatting Mac-formatted drives. Paragon’s HFS+ gets out of your way and doesn’t provide a graphical interface–it just enables access to HFS+ drives in File Explorer and other applications. If you need all these tools, go for it–this is the most full-featured solution for working with Mac-formatted drives on Windows.
But you probably don’t need all these tools. Mediafour does offer a 5-day free trial of MacDrive–both the Standard and Pro versions–so you can give it a try and see if those features are worth it for you. Option Four: Format the Drive as exFAT–But Warning, This Will Erase Your Data! RELATED: Once you’ve gotten all the data off the Mac-formatted drive, you’ll probably want to. Both Windows and Mac OS X have full read-write support for exFAT drives without any additional third-party software. FAT32 has some serious limitations–individual files can only be up to 4GB in size each, for example–but exFAT doesn’t. Rather than use a Mac-formatted drive, you should get the important files off of it and use exFAT-formatted drives for moving data between Macs and PCs.
To format the drive in Windows, right-click it in the File Explorer window and select “Format.” Choose the “exFAT” file system in the list and click “Start.” Remember, this will erase all the files on the drive! Be absolutely sure you have your files off the drive and that you’ve selected the correct drive you want to format! When you’re done, the drive should work on both Windows PCs and Macs with no problem.
By the way, this works great for Windows users too–Macs can’t natively, although they can read files from NTFS drives. So no matter what your primary platform, exFAT is probably the way to go.
Photo by Sharon Vaknin/CNET If you need to expand your storage space with an external hard drive and you use both Mac and PC, you'll likely run into a few obstacles. Hard drives advertised as being compatible with Windows and Mac OS may have misled you into thinking you could actually use one hard drive for both computers. You can, but not out of the box.
Most external hard drives (HD) are sold in a format called NTFS, which is designed to work with Windows. Macs read and write to a different format, called HFS+.
Another format, called FAT32 is compatible with both OS platforms. Here's a look at how the different HD format types function: FAT32 (File Allocation Table) - Natively read/write FAT32 on Windows and Mac OS X. Maximum file size: 4GB - Maximum volume size: 2TB NTFS (Windows NT File System) - Natively read/write NTFS on Windows. Read-only NTFS on Mac OS X - Native NTFS support can be enabled in Snow Leopard and above but has proven instable. Maximum file size: 16 TB - Maximum volume size: 256TB HFS+ (Hierarchical File System, aka Mac OS Extended) - Natively read/write HFS+ on Mac OS X - Required for Time Machine - Maximum file size: 8 - Maximum volume size: 8EiB Isn't FAT32 the obvious solution?
According to the list above, formatting your hard drive to FAT32 so that you can read and write on either OS seems like the obvious solution. The video and directions below will guide you through the process, but before you format your HD to FAT32, beware of these drawbacks.
FAT32 offers no security, unlike NTFS, which allows you to set permissions. If your HD gets into the wrong hands, that person will be able to access your data.
The max size for any given file stored on a FAT32-formatted HD is 4GB. So, for example, if you want to store a 9GB movie, it will be impossible. In general, FAT32 drives are more susceptible to disk errors. It's not a huge issue, but FAT32 is less efficient at storing files. Its large cluster sizes waste disk space, unlike the other HD storage formats.
2:55 If you've considered these issues and would still like to use FAT32, this video will guide you through the process of formatting your HD to FAT32 using a Windows or Mac PC: OK, what are my alternatives to using FAT32? The good news is, it's not FAT32 or nothing.
The alternative solutions do require more tinkering, but if you do not want to risk FAT32's lack of security, choose from one of the following alternatives. Option 1: Format to NTFS, and use NTFS-3G to read/write on Mac. If you keep your hard drive's out-of-the-box NTFS format for all the reasons FAT32 displeases, there's a workaround that will allow your Mac to read and write files to the drive. Is an open-source program that, when coupled with, will let you use your NTFS drive on your Mac. However, it is an open-source program, so use it at your own risk. Many have vouched for its success, but others complain about bugs. The commercial solution, which will give you access to support and software updates, is.
It's $20, offers Lion support, and you get a five-day trial to try before you buy. Option 2: Format to HFS+, and use HFS Explorer to read/write on PC. Conversely, you can format the HD to HFS+ and use HFSExplorer for Windows to read and write to the Mac-formatted hard drive.
To get started, you'll first have to format the hard drive from NTFS to HFS+. Here's how: Plug your HD into the Mac and open Disk Utility, which can be accessed by searching for it in Spotlight. Then, select your hard drive from the left sidebar. Now go to the Erase tab. In the Volume Format list, select Mac OS Extended (Journaled). Then, click Erase at the bottom to format the drive.
Please note that this will complete erase the drive. Any data you want to keep on that drive must be backed up elsewhere first. Now that the hard drive is formatted to HFS+, on your Windows machine to get read and write access to the drive. This is an open-source program, so use it at your own risk. Alternatively, you can opt for paid software like instead. Option 3: Create two partitions on your hard drive to use with each OS, separately.
This solution is a little different than the previous two because instead of having one hard drive that works with both machines, you're splitting your HD into two sections, each dedicated to a different OS. For example, if you have a 1TB hard drive, 500GB of storage can be used with your Windows computer, and 500 will be dedicated to your Mac computer. You won't be able to write to the Mac side from your Windows computer, and vice versa, but it's a good solution for people who want all the advantages each format has to offer for its respective system. Here's how to do it: Step 1: Connect the empty external HD to your Mac and launch Disk Utility. Select the drive from the left sidebar, then click the Partition tab. Under Partition layout, select '2 Partitions.' Now, drag the boxes to adjust the size of each partition.
For example, you might want more storage for your Mac than you do for your PC. Now, click on the top partition, name it 'Windows,' and change its format to MS-DOS. Then click the second partition, name it 'Mac,' and change its format to Mac OS Extended (Journaled). Give your settings a final lookover and click Apply. Step 2: Plug the hard drive into your Windows PC.
Open the Start menu and search for Disk Management. Select the search result and the Disk Management utility will launch. In the left sidebar, you should see your hard drive and its partitions. Right-click the Windows partition and select Format. In the Format dialog box, under File System, select FAT32.
Click OK and complete the format process. With these three options you'll be able to take advantage of either platform's offerings, be it Time Machine support or security options.
In the end, you may end up using FAT32 for its simplicity, but don't say I didn't warn you about the risks.