Let me introduce my build First of all Thank you guys for your help & advises. So I got my first NAS two years ago. (WD My cloud ex2 ultra) and couple months ago I got WD PR4100... Initially I choose WD just because I had no experience and I got a deal. I wasn't happy with that. I had many problems with almost everything. Customer support is terrible... Very poor OS and etc. Finally I decide to go to Synology and good for me I found this great website and project. Thanks!