Do not extract directly to your USB drive. Extract to your PC desktop first.
The PS3 scene is full of malicious files. A "highly compressed" file could contain: Gta V Ps3 Highly Compressed
Always scan downloads with antivirus software and only trust verified scene groups. Do not extract directly to your USB drive
Many "highly compressed" versions strip out the in-game radio stations or the intro videos to save space. If you download a 9GB version: Always scan downloads with antivirus software and only
To fix this, look for a "Full Repack" that only compresses the install data but decompresses to a full 18GB.