A "Data Error" often points to a CRC (Cyclic Redundancy Check) failure. This means the file you downloaded is incomplete or corrupted. Even if it looks like it finished downloading, a single missing byte can trigger this error.
This is the most frequent cause. If your internet flickered for a second while downloading from Nexus Mods, the file might look complete but have internal "data gaps" that MO2 can't read. Archive Format Issues: Some newer mods use high-compression formats (like mo2 extraction failed data error exclusive
: This is the most common cause, especially for large mods (over 1GB). A "Data Error" often points to a CRC