PS4 System Update 4.0 releasing today, includes HDR and updated Quick Menu | VG247
Sony Releases Minor PS4 Firmware Update, Bumping System Software to Version 10.70 : r/PS4
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Sony PlayStation 4 Firmware - PC Guide
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PlayStation 4 system software - Wikipedia
PS4-Firmware 7.50: Versteckte Neuerung verweist auf PS5-Detail
Check Version of PS4 System Software - YouTube
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PS4's 9.60 update: 5 problems and fixes that we found
