Flash card doesn't read

Lopiso Feleke - Mar 28, 2017 at 04:56 AM

My 64 GB flash card read only on my PC,

"Unable to access “lop(G)”

Error mounting /dev/sdb1 at /media/guest-cvujhg/lop(G): Command-line `mount -t "exfat" -o "uhelper=udisks2,nodev,nosuid,uid=994,gid=994,iocharset=utf8,namecase=0,errors=remount-ro,umask=0077" "/dev/sdb1" "/media/guest-cvujhg/lop(G)"' exited with non-zero exit status 32: mount: unknown filesystem type 'exfat' "

This message appear when i try to use on other Desktop. What is the problem??