Additional Reference - Holybro KAKUTE F7 HDV Manual

7. Click the mouse once in the text box at the bottom of the CLI tab to place the cursor there.
8. Instead of typing any commands, right-click in the text box and choose "Paste".
9. Press the Enter key on your keyboard. The pasted-in text will rapidly scroll past.
10. Type "save" in the text box at the bottom of the screen.
11. Press Enter. The flight controller will reboot and the configuration will be restored.

Additional Reference

Here are some links to additional videos to help you build your quadcopter successfully.
If you are using an analog protocol like Oneshot or Multishot, calibrating your ESCs is mandatory. Most
ESCs today support Dshot. If your ESCs support Dshot, you should use it, and you can skip this step.
Failsafe is what happens when you fly too far away or your receiver gets disconnected from your flight
controller. If you don't configure failsafe, the quad could fly away, or it could crash into something... or
someone.
DON'T FLY WITHOUT VERIFYING THAT FAILSAFE WORKS CORRECTLY.
To verify failsafe, remove your props, then plug in your battery and arm your copter. Then turn off your
transmitter. Your motors should stop within 1 to 3 seconds at most.
If your motors don't stop when you turn off your transmitter, DO NOT FLY YOUR MULTIROTOR UNDER
ANY CIRCUMSTANCES.
Betaflight 3.3 Ultimate Setup Guide
https://www.youtube.com/watch?v=8vJCrHj9s6s
How to Calibrate Your ESCs
https://www.youtube.com/watch?v=o3Mg-9M0l24
Failsafe
https://www.youtube.com/watch?v=dikr9oDzQqc