you'll need to flash Pi OS onto your SSD. If you have an NVME-to-USB adapter or NVME USB enclosure, use that to connect the drive to your computer. Then, use the Raspberry Pi Imager to install ...
Now, the Raspberry Pi 5 has a lovely new PCIe port right on board, and [Jeff Geerling] has gone right ahead and slammed in an NVMe SSD as a boot drive. [Jeff] explains that to use an NVMe to boot ...