MO2 uses the Windows Temp directory to stage files during extraction. If this folder is full or has permission errors, extraction fails. Press Win + R , type %temp% , and hit Enter. Delete everything inside (skip files currently in use). Restart MO2 and try again. Check for Long File Paths
Antivirus programs often flag the rapid creation of thousands of small files (common in mod extraction) as suspicious "ransomware-like" behaviour. Add an to Windows Defender for your MO2 folder. mod organizer 2 extraction failed data error
Instead of using MO2’s “Install Mod” button: MO2 uses the Windows Temp directory to stage