NAS Data Storage | File server built on the desktop version, what do you think?

Question

NAS

Good day, I'll try to be brief.
The bottom line, about a year ago, I got the idea to create my own file exchange / file storage service.
I decided to start small, namely to build servers on the Desktop version. (Computer components).
And what is the question itself?
The question is:
What components are not unimportant besides drives.
Namely.

1. Do I need a powerful processor for a file server?
   
2. How much RAM is needed for such a server?
   

(A server that will simply execute write/store/read instructions)
[Sorry, I may not be using the right terms, as I'm relatively new to this stuff].
P/s
It is not necessary to recommend ready-made NAS storage solutions, as I wrote above, I chose the "Desktop" server assembly option.
Based on what I know, I have selected several build options for such servers.
I ask experts in this field to evaluate this option and suggest if I made a mistake in something.
In my opinion, the processor should not be very powerful, since the most important thing, as I said above, is the drives.
RAM is also not in large quantities.
________
Assembly. Option 1:

1. Processor AMD A4-6300.
   
2. Motherboard ASRock FM2A68M-DG3+.
   
3. RAM Kingston ValueRAM 2GB.
   
4. Aerocool Vx-350 [VX-350] power supply.
   
5. Espada FG-SA3114-4IR-01-CT01 controller (For combining drives in a RAID).
   

________
Assembly. Option #2:

1. Processor Intel Celeron G3900.
   
2. Motherboard MSI H110M PRO-VD PLUS.
   
3. RAM Samsung [M378A5244CB0-CRC] 4GB.
   
4. Aerocool Vx-350 [VX-350] power supply.
   
5. Espada FG-SA3114-4IR-01-CT01 controller (For combining drives in a RAID).
   

These server options are notable for their low price, and in my opinion they are suitable for this kind of use, but this is my opinion. I would like to hear yours.
All presented assembly options will use drives: Western Digital Red. Volume 1 or 2 terabytes. Each server will have: 2 or 4 terabytes of memory. The drives will be combined into a RAID array to achieve maximum read / write speed.
Based on the presented assembly options, express your opinion, and correct me if I was wrong somewhere.
P/s2
It is not necessary to say that your own file hosting will not be needed, that there are others without me. I know all this, I have taken all this into account. Just if you know, give information in technical terms.
Thank you for your attention, if I forgot to write something here, I'll write in additions;)
Good luck.

Answer 1

It all depends on the planned load on this server. If you are going to put it on the Internet, then Core2Duo of the T6600 type and 2-4 gigabytes of RAM will be more than enough. And a disk controller is not required for a home - just find a motherboard with more SATA ports. And fault tolerance can also be provided at the software level, for example, using the FreeNAS distribution kit that uses ZFS.
In principle, if you are going to drive files over gigabit in LAN, then Core2Duo and 4 gigabytes of RAM will still be enough in abundance :-) Yes, and there is no point in using RAID to increase IOPS on disks. Your bottleneck will still not be disks, but the network.