Works for Ubuntu 18.04.2 on 05/27/2019
Refer: https://itsfoss.com/mount-exfat/
$ sudo add-apt-repository universe
$ sudo apt update
$ sudo apt install exfat-fuse exfat-utils
Newer notes:
Refer: http://www.howtogeek.com/235655/how-to-mount-and-use-an-exfat-drive-on-linux/
$ sudo apt-get install exfat-fuse exfat-utils
Older notes that worked on Ubuntu 14.04 but reported errors
Refer: https://www.maketecheasier.com/access-exfat-file-system-in-ubuntu/
$ sudo add-apt-repository ppa:relan/exfat
$ sudo apt-get update
$ sudo apt-get install fuse fuse-exfat exfat-utils
In the event that your system doesn’t automount the external drive, here is what you can do to mount it manually:
$ sudo mkdir /media/exfat
$ sudo mount -t exfat /dev/sdb1 /media/exfat