I would look for things on ebay. Google the model and find the type of RAM it needs. Same with disks. Disk drives are pretty universal, as long as you have the trays needed for that server. You either need 2.5 or 3.5 inch SAS drives. I can’t tell from the photo. If you don’t have the drive trays, make sure you get trays for your drives from ebay too. SATA drives will also work, but you’ll have better luck with SAS drives since they’re enterprise spec and tend to be more reliable and last longer. With RAM, the only thing that’s really different from desktop RAM is that you want to make sure you get ECC(error checking) for a server.