The v0.4 update focuses on stability and even deeper system-level tweaks:
: A standard Windows ISO is roughly 5–6 GB; even a heavily modified "repack" with pre-installed games rarely reaches 189 GB unless it is a massive collection of pirated software. Malware Risks
An (often called an ISO image) is a perfect archive of an entire optical disc or storage drive. Everything from the file system structure to the individual data blocks is contained within a single .iso file. Why is it 18.9 GB?