sudo mount /media/sda3

[mntent]: attenzione: non c'è un'andata a capo alla fine di /etc/fstab
$LogFile indicates unclean shutdown (0, 0)
Failed to mount '/dev/sda3': Operazione non supportata
Mount is denied because NTFS is marked to be in use. Choose one action:

Choice 1: If you have Windows then disconnect the external devices by
clicking on the 'Safely Remove Hardware' icon in the Windows
taskbar then shutdown Windows cleanly.

Choice 2: If you don't have Windows then you can use the 'force' option for
your own responsibility. For example type on the command line:

mount -t ntfs-3g /dev/sda3 /media/sda3 -o force

Or add the option to the relevant row in the /etc/fstab file:

/dev/sda3 /media/sda3 ntfs-3g force 0 0