using disk utility mac what format for usb drive

Press Command + Space to open Spotlight search.

Type sudo fdisk -iy /dev/disk1 and press Enter.

Type diskutil unmountDisk /dev/disk1 and press Enter.

Replace /dev/disk1 with your USBs Mount Point in the steps below.

Press Command + Shift + U to open the Utilities Folder.

If you mess up in the terminal, you can easily format the wrong drive and lose valuable data. We recommend resetting your USB Drive via the Disk Utility if possible.

Choose the preferred file system from the drop-down menu for Format.

Select GUID Partition Map as the scheme.

Now, Press the Erase button at the top.

Select the USB storage device from the left pane.

Press Command + Shift + U to open the Utilities folder.

Note: Make sure to connect the USB disk to the computer before you begin. Here is how you can reset a USB disk on Mac using both approaches. Sometimes, due to permission or file system issues, we cannot perform the task using the GUI approach. USB drives on mac can be reset using a GUI approach and also via the terminal. You can replace k with something else if you want to change the drive letter.

Once you receive the completion message, type assign letter = k and press Enter.

Change fat32 to your preferred file system if necessary.

Now, type the following commands and press Enter after each one.

Make sure you get this right as you could easily format the wrong drive. Replace # with your USBs disk number in the next step.

Check the Size section, then note your USBs Disk #.

Type and Enter cmd to launch Command Prompt.

This scans for bad sectors but takes a lot longer to complete.

Optional: Uncheck Perform a Quick Format to do a Full format instead.

Right-click your USB drive and press Format.

Type diskmgmt.msc to open Disk Management.

Optional: Uncheck Quick Format to do a Full format instead.

From the left pane, right-click your USB drive and press Format.

Press Windows + E to launch Windows Explorer.

But if that doesnt work or if you want an alternative method, you can use Disk Management or CMD. The easiest way to reset a USB Drive on Windows is with file explorer.

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Using disk utility mac what format for usb drive