A: Sorry Sir, the walton WP157U5G will not be able to support the Transcend 220S 256GB M.2 2280 PCIe SSD because the PCIe slot size is M.2 2230 and the one you are wanting to add has a size of M.2 2230.
A: Yes Sir, the Transcend 220S 256GB M.2 2280 PCIe SSD will support Asus X509FL Laptop.