Hmm... was the 8gb card partitioned and formatted via the n810 ? If not it might be worth a try. What I don't like seeing is the "attempt to access beyond end of device". Makes me think the (single) parition table on it right now is a little wacky for the N810. I know your other devices can see it fine, but who knows what they check before mounting.

Like run through partitioning it with one partition via "sfdisk /dev/mmcblk0" and then "mkdosfs /dev/mmcblk0p1"

Like my father would always say. "It's like giving chicken soup to a dead man, it can't hurt."