Thank you all very much for your help!
Everything worked out!
One nuance.
I once again created an image on another SD card (32 GB) to distinguish the partitions by volume.
I made the "lsblk" command.
In my case the EMMC was "mmcblk2p1"
Before that, I recorded on an 8GB SD card and the EMMC of the OPI is also 8GB and I could not tell which one is which!
Once again, THANK YOU SO MUCH!!!