If we had to choose any one SSD to fill our system, it would be the WD Black SN7100. This PCIe 4.0 SSD comes in up to 4TB of capacity. The 2TB version that we tested was the fastest overall in our benchmarks. Because the drive uses a host memory buffer design for cache, as opposed to onboard DRAM, it's competitively priced, making it an excellent price-to-performance value.
The best cheap SSD in our view is the WD Blue SN5000, followed closely by Kingston's NV3. Both of these PCIe 4.0 SSDs are fast, and very affordable. However, when it comes to PCIe 5.0, the PNY CS2150 is your bargain choice.
Essentially, gaming consoles are computers so the same SSDs that are best for PCs are the also best for gaming consoles. That said, the excellent performance and super-generous TBW rating of Seagate's Game Drive PS5 SSD makes it our current choice. The DRAM design (which uses onboard memory for secondary caching) results in class-leading random ops performance, as well a full compatibility with PS5.
Our current favorite SATA SSD is the Samsung 870 EVO. It's fast and affordable. However, if you want top capacity, check out the $1700 VectoTech 16TB V-MAX.