Can't install arch

Hi, I have an old Asus laptop that I've haven't touched for ages. Last time I used it, I tried Chrome OS Flex. When trying to install archlinux on it (using a USB bootable drive and archinstall command), it seems like it cannot wipe the drive correctly : https://imgur.com/a/Dd73f6m

How can I reset completely the SSD and make a clean install? Thanks