Rear brakes loose Pickup on frequent braking

Here is a guide that will help with this:

https://www.2carpros.com/articles/how-to-replace-rear-brake-pads-and-rotors

Plus below is the material from the manual of a similar vehicle. We don't offer this vehicle here in the USA so we had to get a similar one to get the process. While this is a different vehicle the process is going to be the same.

Please let us know if you have questions. Thanks