The photos you posted show no meaningful information in identifying your My Cloud Model Number and Generation.
A Model Number will be P/N … but the still won’t tell us what “Gen” you have
Open the Dashboard of your WD My Cloud and look under Device > Firmware
If it’s 2.xxx firmware, it is Gen 2.
If it’s 4.xxx firmware, it is Gen 1
Size doesn’t seem to be a problem … but how you partition and format it can be (See User: Bennor comments … no probs with a 5TB)
