WD Optimus GX 7100M

If you want the absolute best SSD performance for your handheld gaming console or, more generally, for any PCIe 4.0 device, the new Optimus GX 7100M from Sandisk is just the thing. It is the fastest PCIe 4.0 SSD I have tested so far, and it does not lose speed dramatically even during long write operations. However, expect to dig deep into your pockets for this privilege.