Once the USB drive is formatted, it will no longer contain the EFI partition. Once that’s selected, select Quick Format for your USB to be formatted.

Then select a name and a suitable file system like FAT32.Simply right-click on the area that says ‘Unallocated’ and select New Simple Volume.Once you see ‘Unallocated’ in Disk Management, the USB drive is ready to be formatted for a fresh start. This error is OK as long as your USB drive shows ‘Unallocated’ when you see it in Disk Management. Then type ‘select disk x’ (where x is the number associated with your USB drive)Īfter you execute the ‘clean’ command, sometimes you may see an error ‘The system cannot find the file specified.From the list, identify the ‘#’ associated with your USB drive. Then type ‘list disk’ to list all the disks available in your system.In the command prompt, type ‘diskpart’.Click on Windows + X keys and select Command Prompt (Admin) from the list.To use ‘diskpart’ and delete EFI partition, follow the steps below. In order to resolve this problem, you can use a tool called ‘diskpart’ that is available through Command Prompt. When you try to open Disk Management, you may notice that delete volume, extend or shrink volume options are all grayed out, hence disabling you from manipulating the EFI partition. How to delete an EFI partition on a USB drive?Īlthough Disk Management can be used to manage partitions, it doesn’t let you remove the EFI partition directly. It requires you to use the command prompt, so let us learn how to do so in this article. But to delete the EFI partition is not very straightforward. Hence, you may want to delete it to free up space and use the entire USB for storage. Now if you no longer want to use that USB as a boot device, EFI partition is not required. This partition contains boot loaders, some device driver files, utility programs and data files such as error logs. If you have used your USB as a bootable device, it is likely to have a partition called EFI partition.

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