Date: 2024jun6 Q. Visual Studio: Reduce disk space used A. The default size of the Automatic Precompiled headers Cache is 5GB. You can manually delete the "AutoPCH" folder periodically - with no problem - to reclaim space. Or, change the setting for its size in

Tools > Options > Text Editor > C/C+ > Advanced > Automatic Precompiled Header Cache Quota

I changed mine to 2048 (2GB) and everything seems to work fine. Note: This is per-solution. In other words, if you have 10 solutions that's 10 * 5GB = 50GB by default.