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Hi, I've got some DS-2CD2732I(S) cameras from AliExpress. Approx 1.5 years old. They came with EN firmware 5.1.6 at the time of purchase. What is the latest English/multi language firmware that can be installed on these cams? 5.2.8 or 5.3.0? I'm a bit lost in all the firmware threads, so I...