Vivid Unit comes with an M.2 connector and you can connect an NVME SSD to it.
SSD will give you much bigger storage space (Vivid Unit has 32GB eMMC storage) and better read/write speed. However the advantage of booting from SSD instead of eMMC is rather limited -- you will only see one or two seconds faster on boot. It is usually acceptable to let the device boot from eMMC while using NVME SSD as extra storage.
If you do want the device to boot from NVME SSD, you may follow the instructions below.
