Dear all,
I have 4TB of capacity in my cloud but i can only use 2TB apparently. How do i make 4 TB available in the main page?
Thank you
Hi @AugusGon,
Have you opened a Support Case? If not opened, for more information, please contact the WD Technical Support team for the best assistance and troubleshooting:
https://support-en.wd.com/app/ask
Unsure if you figured this out, but thought I would just give you a quick answer in case anyone else see’s this and is confused.
You do have 4TB available.
The default way WD has these systems set up is using a technology called RAID (Redundant Array of Independent Disks). You can read more about it here: RAID - Wikipedia.
So long story short the specific RAID mode that is used by these systems is RAID1 where 1 drive has an exact duplicate of the other. The benefit of this is that should one drive fail, you still have your data and can simply remove the failed disk and put in a new one that works and RAID will automatically copy everything over!
Down side is, it’s a bit slower and gives you only half the space physically available in the hard drives.
Of course, the good thing about RAID is, you can expand it by just adding more and more disks (though this get’s complex, it is very much possible to have 4 2TB drives connected to the network and all acting in unison to give you the equivalent of 2 4TB drives or 1 8TB drive).
With all that said, the option to use all drives as a single volume (through what’s known as RAID0) is usually frowned upon as RAID0 provides NO REDUNDANCY and since parts of all the data are stored on every single drive, WHEN ONE DISK FAILS IN RAID0, ALL DATA STORED ON ALL DISKS IS LOST. This is why combinations are typically used to ensure that if 1 drive fails in one group of drives, the redundancy group can resolve this and copy all the data back over when the broken disk is replaced.
Now there are other ways of connecting drives together that would allow you to use bother 2TB disks as though they were a single 4TB volume without losing all the data on both disks if one fails (namely using spanning of drives methods), BUT again, it’s important to stress, this would mean IF ONE OF THE DISKS FAILS, YOU LOSE THE ENTIRE CONTENTS OF THAT DISK AS THERE IS NO REDUNDANCY.
I hope that was helpful. 
