SP7+ SN530 SSD Upgrade 512GB only showing 420GB? Seems genuine, but it should show more like ~465GB : r/Surface
Bliksem SSD 128GB Unidad de Estado Sólido SATA Ⅲ 6Gb/s 2.5” Interno Disco Solido 3D NAND TLC 520 MB/s de Lectura y 420 MB/s de Escritura H650(Negro 128GB) : Amazon.com.mx: Electrónicos