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Do I have OS3?

Officially? No. The second gen single bay/single drive My Cloud do not officially support installing third party modules.

Important:
* My Cloud (Single Bay) does not support 3rd party apps

Unofficially, one can trick/modify the second gen single bay My Cloud OS3 firmware to allow for some unofficial third party apps to be installed. See the following link for more information about installing unofficial mods on a second gen single bay My Cloud (OS3 firmware).

Do not expect WD to assist or answer questions about unofficial modifications to their firmware/devices.

Support for Western Digital Hard Drives | Western Digital

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