If you have a decent smartphone, the mobile version is much smaller (approx. 20GB-30GB). You can use the same account on PC and Mobile. If you only want to do daily commissions, playing on mobile saves you from downloading the massive PC client.
By default, Genshin might download multiple language packs (English, Japanese, Chinese, Korean).
Savings: 8–12 GB per language.
Genshin Impact is an online-only game. A compressed offline version cannot connect to HoYoverse’s servers. You will be stuck in version 2.x or 3.x, unable to summon new characters, explore new regions, or play co-op.
If you already have the game installed but want to save space for the update: download data genshin impact pc highly compressed free
Disclaimer: I do not endorse piracy or untrusted software. This section is for educational purposes only.
Steps (hypothetical, for a functional repack): If you have a decent smartphone, the mobile
You don’t need a sketchy "highly compressed" version. Instead, use these official and safe methods to reclaim up to 50% of the game’s space.