arch-usb-postinstall

ARCH linux USB post install

https://www.reddit.com/r/archlinux/comments/5p8au4/arch_linux_on_a_persistent_usb_a_guide_i_made_for/

https://www.reddit.com/r/archlinux/comments/7xoted/persistent_and_encrypted_arch_linux_installation/

btrfs

broadcom-wl-dkms (for apple wifi)