Help & Advice adding more storage to Dell Precision 5820

[shopper150]

Chaps,
I need some assistance with adding more storage to s Dell Precision 5820 that I have. I used to be very IT savvy, but have recently fallen behind on the latest tech.

The machine I have has the following installed:
414-BBBT : Dell Ultra-Speed Drive Duo PC Ie SSD x8 Card,
403-BBRH : 1 x SATA/SAS HDD install in Fl ex bay with LSI controller, su pport 4pcs HDD
403-BBQV : MegaRAID SAS 9440-8i 12Gb/s PC Ie SATA/SAS controller - SW RA ID 0, 1,5,10
401-ABJS : M.2 256GB PCIe NVMe Class 40 Solid State Drive
400-AGXX : Internal PCIe SSD (Dell Ultra- Speed Drive)

Firstly, the 256GB that it currently has installed is too small. I'm hoping that it won't be too difficult to clone and replace that drive with a 1TD SSD.

However, I then want to add something like 2 x 1tb SSD's and then perhaps a couple of 4tb hard drives.
I'm unsure how best to do this (I don't really want/need RAID). How relevant are the "414-BBBT : Dell Ultra-Speed Drive Duo PC Ie SSD x8 Card," and "403-BBQV : MegaRAID SAS 9440-8i 12Gb/s PC Ie SATA/SAS controller - SW RA ID 0, 1,5,10" and "400-AGXX : Internal PCIe SSD (Dell Ultra- Speed Drive)" and what do they do?

I may need help with how to install my new proposed drives and also if someone could guide me through the possible drive configurations open to me, I would be most grateful.

 

[megatron]

This question is about Dell parts, here is not the place to ask about Dell. It would be more suited to a Dell forum, or contact customer support or download a manual. At first I thought you must know about this stuff you have but forgot this was pre-built. "RAID" has no space in it, its short for redundant array of independant (or inexpensive) disks.

If you want a 1TB drive I could recommend the SK-Hynix gold S31, its brand new with 128 layer nand (not 96l), has access times comparable to Intel Optane. I am waiting for the Samsung 980pro or Sabrent 4 plus NVME to get benched against each other and this SK-Hynix (although the S31 is not a through and through performance drive, I believe it is using PCI-4.0; but storage review said it was 3.0 but it definately had newer NAND; the S31 bills itself as eco friendly (packaging) and low power consumption). I've held back on getting an NVME but I have 2 slots and I think it will come in handy with this new storage API from microsoft which is the equivalent of what the new Xbox console is doing with its inbuilt SSD.