The Raspberry Pi 4 is finally here and has a lot of exciting changes. One very major downside is that it doesn’t support true USB booting yet out of the box (like the 3 series did).
Switch from SD card to SSD for Home Assistant on a Raspberry Pi 4
Run Raspbian from a SSD or USB Flash drive on Raspberry 4
OpenMediaVault Boot from USB/SSD without SD Card
Radxa Rock Pi 4C Plus SSD Boot Guide - James A. Chambers
Best Working SSD / Storage Adapters - Raspberry Pi 4 / 400
NCP Documentation: NCP on Raspberry PI 4 booting from USB (no microSD needed) - 📑 How to - Nextcloud community
It took me 2 months to boot CM4 from NVMe - NotEnoughTech
Raspberry Pi 4 Boot with USB
How to boot your Raspberry Pi from a USB mass storage device
ODROID XU4/XU4Q SSD Booting Guide - James A. Chambers
The fastest USB storage options for Raspberry Pi
Raspberry Pi 4 Bootloader USB Mass Storage Boot Guide
Raspberry Pi 4 – SD to SSD – gr33nonline
How To Boot A Raspberry Pi 4 From An SSD - The DIY Life