Usb drive cannot format mac

This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information. To submit your questions or ideas, or to simply learn more about It Still Works, contact us. Step 1 Back up all the information on the USB flash drive onto a Windows-based computer before formatting the drive once you format the drive all data is removed.

How to Format USB Flash Drive on Mac

Step 3 Click the "Finder" icon in the lower, left corner of the desktop, then type "Disk Utility" into the search bar. Warning Ensure you only format the USB or removable device, not the computer itself.

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  3. Formatting instructions?

Formatting the computer could cause a loss of all data on the computer. Windows Mac iPhone Android. Smarthome Office Security Linux. The Best Tech Newsletter Anywhere Join , subscribers and get a daily digest of news, geek trivia, and our feature articles. Skip to content.

How-To Geek is where you turn when you want experts to explain technology. Created in , our articles have been read more than 1 billion times. Eject all the mounted ones except for the one that you have to format. Now go to disk utility, select external hard drive and erase.

Format A Flash Drive For Both Mac OS X And Windows

This should work. I was having exactly the same problem as described above; unable to reformat my 16GB USB after interrupting an "erase free space" command. The command will force a reformat--of course any data will be lost, but your drive will be usable. I simply selected it and formatted it and voila!

Here's how to format USB on Mac

It mounts and works! The only solution for me was to format this USB drive on Windows. Also, the Quick Format didn't seem to work, I had to performa a standard format who took very long. I don't understand what happened to the drive to be honest, I never had any error when formatting until now.

Method 1. Format and restore USB to full capacity with free format utility

Sometimes there's a problem with flash disk that is null name and only format corrupting data. Other problem is flash disk that are no media. There's no solution for this removable disks. Home Questions Tags Users Unanswered.

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Did you find the answer in the end? Im having the exact same issue..

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  • Chris Chris 7 7 silver badges 9 9 bronze badges. SeanClt same here!

    How to reclaim full capacity on flash memory card or USB flash drive

    Anyone wanting a different format than ExFAT, you can type man diskutil in Terminal to reference the manual and find out what to type to get your desired format. Type q to quit when done reading. There are also some other commands besides eraseVolume that might better suit your reformatting needs.

    1. If Your Drive Is Blank

    Then I'm just getting "Error: Invalid argument" after 10 or so seconds of it attempting to erase. Before trashing it try this: In disk utility Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Partition button and wait until the process has completed.