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# Choose the drive (connected through your adapter) to flash
# Click write (and set any options you'd like)
# Once you have finished flashing the OS, DON'T remove the nvme SSD. You need to change the config.txt in the root directory of the NVME SSD drive to '''enable pcie''' (<span class="tb_blue">edit config.txt and add 'dtparam=pciex1'</span> on the end of file), this is very important and too many people forget this. Or refer to must [[#Enable PCIe]].
Then pull the NVMe drive, attach it to your Pi 5, and it should boot off it (with or without a microSD card inserted)—assuming you have the bootloader up to date and set the '''BOOT_ORDER''' appropriately!
<span class="tb_red">'''NOTE:'''</span>
If you are flashing a fresh Pi OS to NVME ssd, you must [[#Enable PCIe]]; but if you are COPY or CLONE an old Pi OS from SD card to NVME ssd, and you have already enabled pcie in the old Pi OS in advance, then you don't need to do enable pcie again!
==Set NVMe early in the boot order==