A:AnswerThe 128GB SSD storage is non-upgradable, whereas there is one open memory slot that supports up to 8GB of DDR4 RAM at up to 3200 MT/s. This is in addition to the already soldered 8GB DDR4 memory that comes with this ASUS Vivobook 14" Laptop (X1400EA).
A:AnswerASUS doesn't have a 12v DC mobile adapter available for the laptop, please get one from a third-party seller like BestBuy. If the laptop doesn't POST after connecting an internal SATA drive to the laptop's motherboard, please check if the SATA ribbon cable and the SATA drive are working properly and connected correctly. Also, verify if the SATA drive is compatible with the laptop.