Wd my book duo adding another hdd

Hi guys just had a browse of the forum can’t seem to see what I’m looking for I have a WD MY BOOK DUO that has a WD RED 6TB HDD installed in slot one my question is can you install a second drive without losing data on the currently installed drive? it seems to be that this drive will lose all data? How does one go about adding another drive surely this is a bad move from WD?

Unless I’m missing something and it’s pretty simple to do.



You can reconfigure the RAID disk array using WD Drive Utilities software.

Thanks for your reply my concern is will it reformat my currently installed HDD?