The best build for stable flac 1TB

[Hakushaku]

Hi I'm the new one here.
But interesting of topic like a year, but don't have time to start.
I have Ipod classic 6th with broken disc and iriver h320 with broken battery. I just wondering which way I suppose to go 🤔
I dream to have 1tb to play flac but also I read many complaints of those two builds. Which one will work stable with no issues?
After I read some posts some new (not many) and some old i decide to go on msata. What disc i suppose to buy (higher than evo 840)? Use iflash or just normal adapter.