Ahora que me viene a la mente en Opensat solucioné el tema con la Herramienta de configuración NTFS,marcando la casilla de soporte de escritura en dispositivos externos.
Poniendo mount en la terminal me sale lo siguiente,por si acaso:
/dev/sda3 on / type ext4 (rw,errors=remount-ro,commit=0)
proc on /proc type proc (rw,noexec,nosuid,nodev)
none on /sys type sysfs (rw,noexec,nosuid,nodev)
fusectl on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
none on /dev type devtmpfs (rw,mode=0755)
none on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
none on /dev/shm type tmpfs (rw,nosuid,nodev)
none on /var/run type tmpfs (rw,nosuid,mode=0755)
none on /var/lock type tmpfs (rw,noexec,nosuid,nodev)
/dev/sdb1 on /media/Disco Externo type fuseblk (rw,nosuid,nodev,allow_other,blksize=4096)
/dev/sda1 on /media/sda1 type fuseblk (rw,nosuid,nodev,allow_other,blksize=4096)
/dev/sda2 on /media/sda2 type fuseblk (rw,nosuid,nodev,allow_other,blksize=4096)
/dev/sda6 on /home type ext4 (rw,user_xattr,commit=0)
rpc_pipefs on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
nfsd on /proc/fs/nfsd type nfsd (rw)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
gvfs-fuse-daemon on /home/juan/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=juan)