Since the file size claims are mathematically impossible, what are you actually downloading? In 99% of cases, "highly compressed" downloads for popular AAA games are delivery systems for malware.
Once Genshin is fully installed on your PC, you can compress the installed files without breaking the game. This does not reduce download size but saves disk space. download data genshin impact pc highly compressed
Tool: CompactGUI (free, open source) uses Windows’ native compact.exe with better algorithms (LZX). Since the file size claims are mathematically impossible,
Steps:
Result: You can shrink the installed size from 90 GB to 55–65 GB with no performance loss on modern CPUs. The game still runs online normally. Result: You can shrink the installed size from
DODI often creates "Selective Download" versions. You can choose to download only the English voiceovers, dropping the file size by another 8GB.