// exFAT should be installed in Ubuntu

$ sudo fdisk -l
...
Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 1953522112 1953520065 931.5G 7 HPFS/NTFS/exFAT

soh@ubuntu:~$ sudo mount -t exfat /dev/sdb1 /media/usb0 -o uid=1000,gid=1000
FUSE exfat 1.2.8

soh@ubuntu:~$ df -h
Filesystem Size Used Avail Use% Mounted on
udev 16G 0 16G 0% /dev
tmpfs 3.2G 1.2M 3.2G 1% /run
/dev/mapper/ubuntu--vg-root 457G 108G 325G 25% /
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/nvme0n1p1 511M 6.1M 505M 2% /boot/efi
/dev/sda1 3.6T 89M 3.6T 1% /media/hdd0
tmpfs 3.2G 0 3.2G 0% /run/user/1000
/dev/sdb1 932G 675G 257G 73% /media/usb0

soh@ubuntu:~$ ll /media
total 144
drwxr-xr-x 5 root root 4096 Nov 6 11:38 ./
drwxr-xr-x 23 root root 4096 Oct 16 14:17 ../
drwxr-xr-x 2 root root 4096 Oct 16 14:08 cdrom/
drwxr-xr-x 2 root root 4096 Nov 6 11:38 hdd0/
drwxrwxrwx 1 soh soh 131072 Jan 1 1970 usb0/