Hi, In my daily work I'm mainly using USB keys for work : one with CentOS 7, one with OpenSUSE Leap 15.1, one with Slax Live for data recovery purposes, one with Ghost4Linux and one with FreeDOS which I use for flashing the odd BIOS. Last week I bought a set of three flashy colored USB keys in a local shop. To my surprise, none of them seem to be able to boot anything. When I write a bootable image (CentOS, OpenSUSE, whatever) to any one of the USB keys, the USB key boot option doesn't show up on any one of my sandbox PCs. Looks like I just learnt the hard way that some USB keys can't be used for installation purposes. As far as I can tell, I need a set of 8 GB keys so the biggest image, the CentOS 8 ISO, can fit. Can you recommend a no-nonsense USB key brand which I can use to make a set of USB installation keys ? Cheers, Niki -- Microlinux - Solutions informatiques durables 7, place de l'église - 30730 Montpezat Site : https://www.microlinux.fr Blog : https://blog.microlinux.fr Mail : info at microlinux.fr Tél. : 04 66 63 10 32 Mob. : 06 51 80 12 12