My book vs my cloud

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1

Has any one come across setting up my book to my cloud duo to expand the space on my cloud duo

2

@Sean-Gusto
Is the My Cloud duo on OS3 or OS5?

1st generation My Cloud User Manual.
My Cloud Personal Storage User Manual (wdc.com)

2nd generation My Cloud User Manual
My Cloud Personal Storage User Manual (wdc.com)

3

I have bought both of these in the last year