Hello, You can increase your storage without issue. The easiest thing to do would be to insert the drives into the server, then you would need to create a virtual disk using either OpenManage Server Administrator, or the iDRAC. Once the virtual disk is created, you can then use Windows' Disk Manager to partition it and lay out a file system for use. If you are unfamiliar with creating virtual disks in the iDRAC or OpenManage, there are numerous videos on YouTube showing it, several are from the Dell Tech Center channel. They should be of help.
Hi everyone, I need some help with the situation which I am not very familiar with. I have a DELL EMC R830 in production and for the moment I am using only two HDD in Raid 1, now I wanted to add 4 more HDD because I am running out of space but not sure if I can do that without loosing my data and my Windows 2012 R2 OS which is running with couple VMs on Hyper V. Any advice is highly appreciated.  
Adding additional hard drives to my DELL EMC R830 in production