- There’s something wrong with the USB flash drive.
- The file system of the USB flash drive is not FAT32.
1. Check whether the USB flash drive is broken.
- Plug it into your computer and see if it can be detected.
- Try another USB flash drive.
2. The machine only supports FAT32 format, so if your USB flash drive is programmed to other formats, it won't be detected. You can try formatting your drive as FAT32. Note that your drive will be erased during the process, so before reformatting your USB flash drive, store its files elsewhere. Alternatively, you can use a new drive of FAT32 format.
To reformat your USB flash drive to FAT32, do the following:
For a USB flash drive with a capacity smaller than 32GB:
a. Press the Win key and the X key at the same time to open the Power User menu..
b. Click Windows PowerShell(Admin).
c. On the Windows PowerShell panel, type in the command below and then hit the Enter key.
format /FS:FAT32 /Q X:
Replace the 'X' at the end of the command with the drive letter of your USB flash drive.
For a USB flash drive with a capacity bigger than 32GB:
a. Download the FAT32 Format program.
b. Run the program and format the USB flash drive to FAT32.
a. Open Terminal, input the commands below, and then hit the Enter key.
b. Check the number of your USB flash drive as circled in the above picture. After that, input the commands below, and then hit the Enter key. Note that this step requires your computer password.
sudo diskutil eraseDisk FAT32 USB MBRFormat /dev/diskX
Replace the 'X' at the end of the command with the number of your USB flash drive.
If the problem persists, please contact us at firstname.lastname@example.org for further assistance.