Asus Zenbook UX31a won't boot with new SSD - not even with a bootable USB : r/ASUS
hard drive - Asus ux31e zenbook SSD non-standard / cant upgrade hdd? - Super User
New 128GB 256GB 512GB 1TB SSD For ASUS Zenbook UX21 UX31 UX21A UX31A UX21E UX31E Taichi 21 31 Laptop SSD Replace SD5SE2 SDSA5JK - AliExpress
ADATA 128GB INTERNAL SSD XM11ZZF5 FOR ASUS UX21 UX31 TAICHI 21 TAICHI 31 SERIES | eBay
ASUS ZenBook 14 Ultra-Slim Laptop 14” Full HD NanoEdge Bezel, Intel Core i7-10510U, 16GB RAM, 512GB PCIe SSD, GeForce MX250, Innovative ScreenPad™ 2.0, Windows 10 Pro, UX434FLC-XH77, Royal Blue