sudo apt-get install exfat-fuse

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  exfat-utils
The following NEW packages will be installed:
  exfat-fuse exfat-utils
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 64.4 kB of archives.
After this operation, 273 kB of additional disk space will be used.
Do you want to continue? [Y/n] 
Get:1 http://cn.archive.ubuntu.com/ubuntu bionic/universe amd64 exfat-fuse amd64 1.2.8-1 [24.5 kB]
Get:2 http://cn.archive.ubuntu.com/ubuntu bionic/universe amd64 exfat-utils amd64 1.2.8-1 [39.9 kB]
Fetched 64.4 kB in 3s (19.2 kB/s)      
Selecting previously unselected package exfat-fuse.
(Reading database ... 277670 files and directories currently installed.)
Preparing to unpack .../exfat-fuse_1.2.8-1_amd64.deb ...
Unpacking exfat-fuse (1.2.8-1) ...
Selecting previously unselected package exfat-utils.
Preparing to unpack .../exfat-utils_1.2.8-1_amd64.deb ...
Unpacking exfat-utils (1.2.8-1) ...
Setting up exfat-utils (1.2.8-1) ...
Setting up exfat-fuse (1.2.8-1) ...
Processing triggers for man-db (2.8.3-2ubuntu0.1) ...