I think I managed to upgrade the firmware from within Kubuntu (it wasn't the OS Nvme) by using this method https://blog.quindorian.org/2021/05/firmware-update-

I think I managed to upgrade the firmware from within Kubuntu (it wasn't the OS Nvme) by using this method https://blog.quindorian.org/2021/05/firmware-update-samsung-ssd-in-linux.html/ https://blog.quindorian.org/2021/05/firmware-update-samsung-... I've done it some months ago, so I don't remember if it was that one exactly. I'm now relieved to know that 5B2QGXA7 is still the current one.