How to choose a SSD for your Asus and how to install it| Accesoires Asus
Amazon.co.jp: ASUS Portable SSD ROG Strix Arion S500 USB-C 3.2 Gen2 / Transfer Speed up to 1050MB/s / 500GB Large Capacity / Data Encryption with 256-bit AES Enabled Disks : Computers
ASUS ROG Strix GL503VD-DB71 SSD Replacement - iFixit Repair Guide