Yeah, in the machinations around my phones and breaking them, I wanted to put a few files onto the microSD card from the phone. I put it into an adapter, put the adapter into my computer, and… filesystem exFAT not recognized?!? Hmm.
I guess when I loaded up Ubuntu 18.04 onto this computer, I didn’t put the exFAT utilities onto it.
It turns out that it’s as simple as:
sudo su -
apt-get update
apt-get install exfat-utils
Of course, you need to enter the root password when you “sudo su”.