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PlayStation 4's Operating System
Name: ORBIS OS
Based on: FreeBSD 9.0
Platform: 64 bits (x86_64)
Disc vs Download
PUP files on PS4 discs are 1GB, regardless of version, as they are zerofilled at the end of the file, just like PS3 PUP were zerofilled to 256MB. Hence, their hash will differ.