Before initiating the , ensure you have enough free storage space on your hard drive. The download sizes vary depending on your platform: PlayStation 4 / PlayStation 5: ~13 GB Xbox One / Xbox Series X|S: ~13.5 GB PC (Steam / Ubisoft Connect): ~12.5 GB How to Initiate the Download

However, 1.56 coincided with two important events:

The download size varies significantly depending on your platform and whether you have the latest previous patch installed. Below are the approximate sizes as reported by Ubisoft and community testing:

| Platform | Download Size | Notes | | :--- | :--- | :--- | | | 450 MB – 520 MB | Requires double that for installation | | PlayStation 5 (BC) | 470 MB | Runs via PS4 backward compatibility | | Xbox One | 400 MB – 480 MB | Varies by region | | Xbox Series X|S | 410 MB | Smart Delivery handles the patch | | PC (Steam) | 650 MB | Includes shader cache updates | | PC (Epic/Uplay) | 630 MB | Smaller if using high-bandwidth mode |

While Ubisoft’s official patch notes for 1.56 are typically concise — often citing “stability improvements” and “bug fixes” — a forensic analysis of the download reveals several key components. First and foremost, the patch addresses that could degrade performance during extended play sessions, particularly on next-gen consoles running in backwards compatibility mode. Second, it includes critical security and stability fixes for the game’s proprietary AnvilNext 2.0 engine, patching vulnerabilities that could be exploited by malicious save-file modifications on PC.

Because Update 1.56 was a significant backend release, some users have encountered deployment hitches: