Bestbuy offers WD - BLACK SN850P 4TB Internal SSD PCIe Gen 4 x4 with Heatsink for PS5 for $341.99 (orig. $499.99) with free shipping.

Product Description:
Officially licensed for the PlayStation5 console, the WD_BLACK SN850P NVMe SSD for PS5 consoles allows you to store more titles with worry free installation. Instantly add up to 4TB of storage to hold more of your favorite games. With an optimized heatsink built specifically for the PS5 M.2 slot, you won’t need to worry about compatibility. Experience uninterrupted gameplay as your WD_BLACK drive runs cool with quality you can trust. The WD_BLACK SN850P NVMe SSD for PS5 consoles is certified and tested for PlayStation 5 consoles so you can store more, play more, fast. 

• Officially licensed for your PS5 console
  Store and play more titles on the drive that’s officially tested and licensed for your PS5 console so you can keep gaming with confidence.
• Exclusive heatsink design
  With an exclusive heatsink design featuring the PlayStation logo and optimized for the PlayStation5 console’s M.2 slot, installation and setup is worry-free.
• Store more, play more, fast
  With up to 4TB capacity, your PlayStation5 console has the additional space to store up to 100 games so you still have room for the next big title.
• Get the ultimate gaming edge
  Take advantage of irrational PCIe Gen4 NVMe speeds up to 7,300MB/s read and 6,600MB/s write (2TB and 4TB model) for a responsive and seamless gaming experience.
• Never stop playing
  Experience uninterrupted gameplay with a heatsink that keeps your WD_BLACK drive running cool and reliability that you can only get from a brand you trust.
• No More Compromising
  Play directly from the drive and eliminate the need to transfer or delete games from your console with tested and approved storage for your PS5 console.