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Boot from a USB device
Boot normally from an SD card then type…
sudo apt update sudo apt upgrade -y sudo apt full-upgrade -y
Check the bootloader version by typing…
sudo rpi-eeprom-update
If an update is required type…
sudo rpi-eeprom-update -a
Reboot by typing…
sudo reboot
Once restarted check the bootloader again by typing…
sudo rpi-eeprom-update
Then shutdown the Pi by typing…
sudo shutdown -h now
Prepare an OS installation using the Raspberry Pi Imager but writing it to the USB device you intend to use on your Pi.
Remove the SD card from your Pi and plug in the USB device you have just prepared.
Power up your Raspberry Pi as normal.
Your Raspberry Pi should boot as normal from the USB device.