The Subnautica PS5 file size is considerably smaller than the PS4 version thanks to compression tech used by the console's SSD.

Dedicated hardware for decompression and installation that prioritizes necessary files will help the Xbox Series X save space on the SSD.

"We added SSD cache to EonStor GS unified storage for accelerating file-level random access data. For general applications like office file sharing and emails, users can deploy one or two SSDs ...

We’ve also seen the benefits of the PS5’s SSD compression tech on games like Control: Ultimate Edition, which weighs in at 42.5GB on Xbox Series X, but only 25.79GB on PS5.

With file compression turned on, Microsoft is able to save 1.5GB of storage for the 32-bit version of Windows 10 and an even more impressive 2.6GB for the 64-bit version.