The notebook has no extra hard disk space, so you can't add another hard disk directly. It is not recommended to modify the position of the optical drive, which will affect the warranty period. If SSD is installed, it is recommended to replace the original hard disk with SSD. Mechanical hard disk, you can buy a mobile hard disk box as a mobile hard disk.
I hope the above information can help you! If the above reply still doesn't help you, you can continue to ask questions or contact ASUS service hotline 400,600-6655 for consultation! thank you