A little while ago I decided I want to build a completely new PC, new case/parts/everything. My topic isn't about that PC, it's about my current one. I do not really have family members or friends that are interested in my current one. So, I decided on re-designating this PC to a NAS. However, in two Discords I am I basically get the response that my current PC would be overkill as NAS, or that I am better off with just buying a pre-built one.
Current PC
Motherboard: ASRock B85M Pro4
CPU: Intel i5-4460 quad core 3.20Ghz.
GPU: Radeon R9 390 Series.
RAM: 16GB.
1 SSD and 2 HDD.
The plan
So the plan is that I repurpose this PC, take out what I don't need and buy stuff like a better case, perhaps a smaller motherboard so I can put the NAS away, slap FreeNAS or Plex on it and call it a day. It's also mostly used for family media. Videos, photos, shared music, you name it. So basically just storage. I know there are plenty of cloud based storage providers... but I want to re-purpose this PC and I like to have that stuff locally. I'm sure Google Drive will be around until I am dead, but pictures locally is better.
Question
So, in short, for a man that does not want to throw away what he has and needs a project, can I use my old PC as a NAS?