I had a PR4100 with 4x6TB drives in RAID 5. I upgraded the drives to 10TB one at a time, rebuilding the RAID each time. The PR4100 recognizes they are 10TB in the RAID but does not show any additional freespace. How to I expand the existing volume? I don’t want to create another separate volume.
You are SERIOUSLY in the wrong part of the forum (MyCloud HOME is a completely different product)
Go into Raid options (or something like that) (where you would change raid modes) and look for a “Volume Expand” option.
All I can say short of RTFM. 
