On the test, I will update the SSD firmware of the Kingston SV300S37A 120Gb drive.
1) Download the official utility Kingston SSD Manager with firmware upgrade
https://www.kingston.com/en/support/technical/downloads/90683
2) Run the downloaded utility and if there is a firmware newer, the “Update to firmware …” button will be displayed, and click it to start the update process, which will last a few seconds.
Done, watch the video as I did: