# Determining which port to insert the USB flash drive

If you are unsure which port to insert the USB flash drive in, use this information to ensure that you are using the correct port.

## About this task

When a canister has a flashing status LED, you can use the full sized USB port on the canister for system initialization.

## Procedure

1. Determine the USB port that is associated with the canister that you used to confirm the status LED. For both the left and right canisters, there is one full sized USB port into which you can insert the USB flash drive. Use one of the USB ports that corresponds with the canister that you used to verify the status LED. Each canister contains a USB port to be used for initializing the system. Figure 1 shows the locations 1 and 2 of the USB ports on both the left and the right canister. Only one USB port is used for initialization. Ensure that you are inserting the USB drive in the same port that you used to confirm the status LED.
   Figure 1. Location of the USB ports on both canisters
2. You can use either of the two USB ports for system initialization.

Parent topic: The identify LED does not light or does not turn off