[ARM Stable Update] 2020-10-12 Firefox, LibreOffice, Gnome, Mesa and Kernels

Should it be it possible to boot the PBP from USB by now? I tried with a USB-hard drive and so far I have not got it working. I have installed the latest bootloader that came with this update.

If you have Uboot on either SPI, eMMC or SD, you can boot from USB.