Marvel’s Guardians of the Galaxy has been updated to version 1.01 today by Square Enix. You can find out the complete patch notes for this update from here.
There are many fixes included in the update that has been released today for Guardians of the Galaxy. Some of the bug fixes haven’t been detailed but aside from that, there are stability tweaks and localization, and performance improvements as part of the new update. You also need the day one patch to get the photo mode.
Guardians of the Galaxy Update 1.01 Patch Notes
So the download size of this update is being reported to be 20 GB on the PS4. This is a significant size in itself. You can find out the size details on Orbis Patches.