How to Format a USB on a Mac

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This video will show you How to Format a USB on a Mac.

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  1. this isn't helping me. when i click disk utility and plug in my USB flash drive, it pops up on my desktop as "NO NAME" and doesnt read in disk utility. i dont know what to do

  2. This video is okay for any USB without files already on it, However I can't seem to find any videos explaining how to do this with files already on the USB…Is there any way of doing this? 'The disk you inserted was not readable by this computer.' shows up on my MAC Book Air but every other computer doesn't allow me to back up the data before erasing all the data

  3. Hi! I've just come across your video while searching for a problem I have with an empty usb with 259,2 MB but it only has 963 KB free and it does not have any file at all. When I try erasing it using disk utility here in my mac OS X yosemite, a message pops out saying an error occurred and I don't know what else can I do…
    I hope you can help me! Thank you!

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