This is about creating a persistent usb-stick and transform the filesystem to btrfs … This may be a good “lesson” to learn some things about btrfs without any risk.
Ok, so I have missunderstood your question sorry. So yes chroot from the persistent-USB should work as long as you could mount the / from the other manjaro installation.
Hello, I don’t know what category select for that, but how I can create persistent Live USB, so data will stay on drive after reboot? I know from own experience that using built-in installer is not good way to do it. I have empty 16 GB USB stick and Manjaro XFCE ISO (full), also I don’t think I need to put more system information.
Create Arch Linux based bootable USB drives