
Warning: Do not re-enable OS verification on boot screen as you will not be able to disable it anymore (since ChromeOS is erased) and you may not be able to boot anymore.
Download the image you want (Leap is stable, Tumbleweed is rolling) from here:.
Once SD card is inserted in the Chromebook, power-up and in order to boot from external storage, press Ctrl-U (If you don't, the device will boot into ChromeOS in developer mode again after 30 sec, press Ctrl-D to enter ChromeOS immediately). Enable USB/SD booting by running the following command as root from ChromeOS. Open a root shell: login to ChromeOS, open crosh with 'ctrl-alt-t', start a real shell with 'shell', become root with 'sudo -i'. Put your Chromebook into developer mode. 4080 mAh 2-cell LiPo battery, providing over 6.5 hours of battery life. 0.7 inches / 18 mm thin – 2.42 lbs / 1.1 kg weight. External SIM card slot (-H01 model only, -A01 model has a dummy instead). External headphone/microphone combo jack 3.5mm. Built-in dual band Wi-Fi 802.11 a/b/g/n. Samsung Exynos 5250 dual core CPU 1.7GHz.
5.1 SD/USB booting disabled after battery empty. 4 Writing a disk image to the internal eMMC. 3.1 Writing an image from ChromeOS (to an SD card).