Voilà ce que ça me met quand je tape les codes :
ubuntu@ubuntu:~$ sudo mkdir /media/test
ubuntu@ubuntu:~$ sudo mount -t vfat /dev/sdb1 /media/test
ubuntu@ubuntu:~$ sudo mount -t ntfs /dev/sdb1 /media/test
NTFS signature is missing.
Failed to mount '/dev/sdb1': Argument invalide
The device '/dev/sdb1' doesn't seem to have a valid NTFS.
Maybe the wrong device is used? Or the whole disk instead of a
partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?
ubuntu@ubuntu:~$