# Update Junos on an EX series Juniper Switch via USB (standalone device)

**Pre-requisites:**

- USB 2.0 (or later) Flash Drive formatted as FAT or MS-DOW
- Latest JunOS (9.6 or later) firmware for your device

**Step 1**

Move the Junos firmware file to the root folder of the USB drive.

**Step 2**

Console into the Juniper device and enter shell as root by typing start shell user root and enter the admin password for the Switch.

**Step 3**

Mount the USB device by typing the command mount_msdosfs /dev/da1s1 /mt.

**Step 4**

Enter CLI on the Junos device by typing cli.

**Step 5**

Enter command request system software add /mnt/>image name "jinstall-exe-4200-10.0S10.1-domestic-signed.tgz".

**Step 6**

Reboot the EX switch by typing request system reboot.

**Step 7**

After the reboot, log back in and verify the new Junos version by typing the command show version.