Playing with qubes part 2

[tymd]

Is the flash drive only needed at the time of booting the system? Can it be removed when the system is already running?

I would be grateful if you could help on a related issue

Sys-usb for encrypted boot, header and external SSD

Good afternoon, please help. Installed the system on an external SSD drive m2 nvme, the drive is connected to the computer via USB 3.0. I also did a separate encrypted boot and header according to this guide: Everything is fine, only I didn’t create sys-usb, I’ve read seemingly all the threads on the forum and documentation on the website, but I can’t figure out which commands to use to make one usb controller connected to dom0 (I have 3 usb controllers) and what to do for the flash drive wh…