I am looking for the best and cheapest way to store around 30TB of data. Its mostly files with the size of 150MB per file which I have to read alot, so a cloud solution doesnt really fit my needs since its too slow to download a file every 15 seconds and than delete it again. Loading of such a file to my pc shouldnt really take much longer than 1 second. Thank you in advance

  • Are the drives storing the data allowed to fail, or is the data critical? 5 8 TB drives in RAID5 would give your 32TB with a one-drive fault tolerance.
    – towe
    Sep 27 '21 at 5:54
  • They can fail, that doesnt matter too much for me.
    – Crispy
    Sep 27 '21 at 7:54
  • 4x 8 TB or 2x 16 TB then in RAID0, that'll also give you very fast read and write speeds. Maybe you can get a good deal on some ex-Chia HDDs.
    – towe
    Sep 27 '21 at 7:55
  • I need to buy a suitable NAS for this aswell or how would I set it up the best way ?
    – Crispy
    Sep 27 '21 at 8:06
  • Depends on your PC. My case would fit up to four 3.5" drives, so 2 x 16 TB would be trivial.
    – towe
    Sep 27 '21 at 8:07

Two hard drives in RAID 0 is cheap and fits in most PC cases. You don't need a NAS if you have 2 SATA ports free


I am looking for the best and cheapest way to store around 30TB of data.

best and cheapest almost never coincide.


  • lowest cost storage, as in TB per dollar, is 3.5" hard disk drives, either in 4,6,8,10,12 TB size each.
  • It is over a few years ago, that I priced X tb disks per cost, to determine TB/$, to know which size disk was the best size for the buck. You would need to do that now given current economy and whatever prices are. Then get N disks of that size to meet your needs.
  • Ideally get all the same make & model because you will be RAID-0'ing them together to reach your 30TB or whatever size. This RAID-0 combining is the cheapest way.
  • Additionally you will need a pc motherboard with enough SATA ports and a tower large enough to hold N 3.5 hard disks to meet your ~30TB size. If you got 10TB disks, figure 4 of them to account for formatting which results in around 90% of usable disk of what's advertised on the label.
  • Choose a pc motherboard that offers INTEL RAID capability, which many do now, and can be had under $100
  • Know that consumer motherboard hardware raid built into the motherboard is sketchy and a lot of people have complained about it over the years. I tried using it years ago, was problematic, never bothered with it since. Cheap != Best but it can work, and there's other ways to volume together N disk it does not have to be at the hardware raid level. You can also just Have N disks show up separately as D: E: F: and so on and split your data manually, unless you really require one volume of 30TB under one drive letter or folder name.


  • buy the same setup of N ? TB disks
  • make sure the disks are on the synology approved list so they work as intended and are reliable, don't buy the cheapest brand you find on amazon or ebay.
  • get a Synology NAS, such as a DS1515 5-bay unit, for around $500 not including hard drives
  • configure as needed, such as RAID-5 to be disk fault tolerant.
  • will be the most reliable in long run for not losing data
  • I only use synology as an example here because I have first hand experience with them, there are other makes, look up NAS as in network attached storage.

and come to think of it online cloud storage might actually be the cheapest these days, you would have to price it out for cost over time versus somewhat of a one-time setup cost to have your storage local and physically in your presence and control, and what best is for you. Obviously if you don't have [fast | good] internet connection then you kinda don't have access to your ~30tb of data.

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