Force format external hdd mac

How to Format an External Drive in OS X

Click the format you want to use to select it. If you've formatted your drive before, check the Quick Format box as well. Click Start , then click OK. Doing so prompts Windows to begin formatting your drive. Your external hard drive's files will be erased during this process. Click OK when prompted. Your external drive has now been reformatted to your selected file structure.


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Method 2. If you're using an iMac, you may find the USB ports on the side of your keyboard or on the back of the iMac's screen. Not all Macs have USB ports. Open the Finder. It's the blue, face-shaped icon in the Dock. You can also just click the desktop.

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Click Go. This menu item is in the upper-left side of the screen. Click Utilities.

How to Use Disk Utility in macOS Mojave to format,erase, partition external hdd

It's near the bottom of the Go drop-down menu. Double-click Disk Utility. You'll find this in the middle of the Utilities page.


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  • Click your external hard drive's name. You'll see it in the window on the left side of the Utilities window. Click the Erase tab. It's at the top of the Disk Utility window. Click the "Format" drop-down box. It's in the middle of the page. Only works on Mac. Mac OS Extended Case-sensitive, Journaled - Version of the default Mac format that treats files with the same name differently if there are case differences e. Has no storage limit. Click Erase , then click Erase when prompted. Doing so will cause your Mac to begin erasing and reformatting your external hard drive.

    Once it finishes, your drive will be reformatted. Can I format an external hard drive to work for both Mac and windows? If so, how? Yes, you can. The former has an individual file transfer size limit of 4GB, and the latter doesn't have that limitation.

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    Yes No. Not Helpful 0 Helpful 6. How do you format an external hard drive which says it can't be formatted? Try removing the external drive's partition in Disk Manager and setting up a new one. Not Helpful 7 Helpful 5.

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    By using this service, some information may be shared with YouTube. Warnings Formatting does not destroy all data on hard drives. The format process prepares the drive to save new files. If you have a NAS drive that connects over the network then you should read this article about connecting to a NAS drive. There are a number of reasons why the hard drive, flash drive or SSD might not be showing up. It may have been formatted incorrectly, it may be corrupted, it may have a faulty or inadequate cable, or there could be something else.

    If you run though the following steps you should hopefully be able to identify the cause and fix the problem. To unmount your drive you can right-click control-click on the icon on the Desktop or in the Finder and choose Eject. Apparently most drive issues are caused when the disk is removed without ejecting it properly.