A assinatura NTFS está faltando na partição mmcblk0

Question

quando executo este comando:

mount /dev/mmcblk0p3/ /mnt

Eu recebo o seguinte erro:

NTFS signature is missing.
Failed to mount '/dev/mmcblk0p3': Invalid argument
The device '/dev/mmcblk0p3' 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?

Eu tentei com este mount -t vfat /dev/mmcblk0p3 /mnt também, mas eu recebo:

mount: wrong fs type, bad option, bad superblock on /dev/mmcblk0p3,
       missing codepage or helper program, or other error

       In some cases useful info is found in syslog - try
       dmesg | tail or so.

Qual poderia ser a causa desses erros?

P.S the mmcblk0p3 contains windows 10 and i'm locked out (forgot the password) i'm trying to get the data inside it