Building my first DIY NAS. Need 2+2 tb to start off with. Trying to be as cheap as possible. Will be storing all memories and irreplaceable things. Will get an external HDD for offsite backup. Also, I do not care about read write speeds. I just want my data to be safe and backed up at the end of the day for as cheap as possible, I will add new data maybe once a month if not even more rarely. I will be using my old motherboard (6 SATA ports) and processor. Will get a new 500 GB ssd for OS and new RAM.
Now here is the dilemma. I am from India and WD Purples are selling for 5250 INR each, cheapest. Next up, WD Blue is also selling for 6000+ INR. I can technically afford (but want to avoid at all costs) to get a 10TB UltraStar or EXOS for 22000 INR but I need two physical drives at least and my total storage need for backup right now or even 3 years later will not exceed 4-5TB. so a 10TB HDD will be useless, not to mention spending 45K INR on drives only (which is VERY VERY EXPENSIVE FOR ME).
I know WD Purple glosses over write errors and can be bad. Chucking is equally expensive, if not more. Should I just get 2x 2tb WD Purple for 10.5K INR and set up my backup server for now. Will add more HDDs later as needed (1-4 years later). Can I do anything to prevent the write errors?
Also, if there is a cheaper way, especially in the long run, I would appreciate it. Currently I have ~2TB data which grows by like 200-400GB a year. I have thought of BluRay drives but I am unable to procure new BluRay drives cheap enough.