In the manual it says: “Important: Only WD large capacity hard drive assemblies can be inserted into the My Book Live Duo drive enclosure. Visit http://support.wdc.com and search the Knowledge Base Answer 8644 for detailed instructions on obtaining a replacement drive for this product. Use only WD hard drive assemblies or your warranty will be voided.”
But there is no list or “detailed instructions on obtaining a replacement drive for this product.” under answer 8644…
So from what I understand, any large size WD/HGST HDD should be fine, even if it’s a different size. Is that right?