MyDocs and /home/opt "ususally" are
/dev/mmcblk0p1 and /dev/mmcblk0p2 and are on emmc and not nand.

Take out microsd card to have /dev/mmcblk0 point to emmc.

to access MyDocs content from freshly booted rescue os
you can do:

mkdir /tmp/MyDocs
mount /dev/mmcblk0p1 /tmp/MyDocs
ls /tmp/MyDocs

and for opt:

mkdir /tmp/opt
mount /dev/mmcblk0p1 /tmp/opt
ls /tmp/opt

Good Luck