I've read the wiki for choosing a pc for a dedicated bi server. 6th gen intel i5 or i7, 8gb of mem, win8 or higher, standard Intel video card, no dedicated graphic card etc. Seen recommendations for an hp elitedesk or dell optiplex, refurbished with 3yr warranty. People mention finding good systems on ebay or dell outlet, but I'm having a hard time finding any decent deals, and with so many options available between different models, it can become overwhelming and gets my anxiety up.
I had originally bought a nas and two 4tb seagate ironwolf nas 3.5" sata drives to run as my nvr and use the surveillance station software but have since returned the nas, so I would like to be able to utilize those drives I have to net me 8tb or storage.
Looking at a dell optiplex 7050 i7-7700 but it only has the ability to run a 3.5" hdd and two 2.5" hdd/ssd per my research of the device, not to mention it is close to $600 and I will need to up the ram from 4 to at least 8gb and current storage isnt enough. So I'm not sure running one of the existing 3.5hdd I have now in 4tb will be enough and from what I've read, use of an external hard drive is not recommended although not sure why?
I'm also looking at a couple 3060 mini towers, one is a i5-8400 ($626) which needs storage upgrades, and the other is a i5-8500 ($520) which needs ram and storage upgrades.
So what are my options for expanded internal storage outside of buying a single $300 dollar 8/10tb hdd ? Anyone have any experience with these models? Anyone have a link to a good pc that would be a good option and a good price. I'm not a computer guy. I dont know how to build a pc and I'm just not familiar with the inner workings of a pc. I'm having to learn everything as I go. Any help will be appreciated.

I had originally bought a nas and two 4tb seagate ironwolf nas 3.5" sata drives to run as my nvr and use the surveillance station software but have since returned the nas, so I would like to be able to utilize those drives I have to net me 8tb or storage.
Looking at a dell optiplex 7050 i7-7700 but it only has the ability to run a 3.5" hdd and two 2.5" hdd/ssd per my research of the device, not to mention it is close to $600 and I will need to up the ram from 4 to at least 8gb and current storage isnt enough. So I'm not sure running one of the existing 3.5hdd I have now in 4tb will be enough and from what I've read, use of an external hard drive is not recommended although not sure why?
I'm also looking at a couple 3060 mini towers, one is a i5-8400 ($626) which needs storage upgrades, and the other is a i5-8500 ($520) which needs ram and storage upgrades.
So what are my options for expanded internal storage outside of buying a single $300 dollar 8/10tb hdd ? Anyone have any experience with these models? Anyone have a link to a good pc that would be a good option and a good price. I'm not a computer guy. I dont know how to build a pc and I'm just not familiar with the inner workings of a pc. I'm having to learn everything as I go. Any help will be appreciated.


