Why? Because a functional X8 Sandbox with a Windows emulator and a game (like GTA V or The Sims 4) requires actual storage space. You cannot compress a 4GB virtual hard drive down to 200MB without corrupting the file system.
Inside X8 Sandbox settings, you can export and import your data. Instead of keeping five different sandboxes, keep one clean base backup and delete the rest. x8 sandbox highly compressed
Unlocking Next-Gen Emulation: The Truth About the “X8 Sandbox Highly Compressed” Craze x8 sandbox highly compressed