Now I did this tip with removing 2nd and 1st partition and using the sd only booting from ssd. https://www.raspberrypi.org/forums/viewtopic.php?f=131&t=268476&sid=dee0cff6cef64bc32307f11bd2ea09cc When I only want to have the ssd because of limited lifetime of sd card, is that method good? Only booti...