Bingo c’est réglé !!! Ne fonctionnant pas en passant par l’interface j’ai testé en passant le terminal et c’est passé sans problème :
ha os info
From one of the lines in the result, you can see that the current data disk is /dev/mmcblkXYZ. That means currently our data disk is located on the SD card.
Connect your USB drive and type:
ha os datadisk list
As a result you should see something like /dev/sdX (in my case it was /dev/sda). This is the USB drive that I want to use as Home Assistant external data disk.
The next and the final command that I have to type is:
ha os datadisk move /dev/sda
Replace the /dev/sda with your device if it is different and hit enter.
the same procedure will follow: restart with 10 to 20 minutes of moving the data disk from the SD card to the USB drive.