Precision 5820 - M.2

Hi all,

Hoping someone can help. I have a Precision 5820 that came with a SATA SSD. I'd like to upgrade it to M.2 NVMe and possibly to an M.2 NVMe Raid array. Can you please tell me what components I need to add AND any preferred M.2 manufacturers/models. I plan on using 1TB drives

Thanks in advance.