diskpart
list vol  
sel vol <number of efi partition>
assign letter S
exit

mkdir S:\EFI\usbfedora
copy ?:\EFI\BOOT\* S:\EFI\usbfedora\

 "In order to assign a letter to the EFI partition on Windows 10 using Command Prompt (CMD), you'll first need to open CMD in admin mode. Here are the steps:

1. Open Command Prompt with administrative privileges: Click on the Start button, type `cmd`, then right-click on "Command Prompt" and select "Run as administrator."

2. After opening the command prompt, you'll be using `diskpart`, a command-line utility provided by Windows for disk partitioning. Enter `diskpart` and hit `Enter`.

3. To list all disks available, type `list disk` and press `Enter`. You should see a list of all your active disks. 

4. Identify the disk that contains the EFI partition (usually Disk 0). To select the disk, type `select disk 0` (replace 0 with the actual disk number) and hit `Enter`.

5. Now type `list partition` and hit `Enter` to display all partitions on the selected disk.

6. Identify the EFI partition (usually around 100 MB). To select the partition, type `select partition 1` (replace 1 with the actual partition number) and press `Enter`.

7. Now, assign a letter to the EFI partition. To do so, type `assign letter=Z:` (replace Z with your preferred letter that is not in use) and press `Enter`. This assigns the letter Z to the EFI partition.

After these steps, you should now have an assigned letter to your EFI partition. Be cautious when using the DiskPart utility as incorrect usage can lead to data loss.

**Note:** The EFI partition is a special partition that contains important boot files for your system. Changing, deleting, or modifying files within this partition could prevent your computer from booting. Unless you have a specific reason for doing so, it's best not to make changes to this partition."