I have spent a lot of time configuring a RPi3b to run from an SDD and then installed Hass.io but I am thinking of upgrading to a RPi4. If I simply configure the RPi4 to run from the SSD can I simply connect my SSD from the RPi3 or do I have to start from scratch?
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Unfortunately no. You need to do a snapshot, and install the correct version of Home Assistant on the SSD but then the RPi4 won’t boot directly from the SSD and you will have to have an SD card to boot and then uses the SSD.
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