hi,
Im looking for a NAS for home use. mainly for backup and streaming mkv via media player. Im also interested in streaming mp3 via my android phone.

1) is a 2-bay NAS sufficient for me? what is the advantage of having a 4-bay?

2) i have limited budget. so either Synology DS211j or QNAP TS-210. Im planning to get 2 X 2TB samsung F4. Is samsung F4 compatible with both models? coz I read somewhere that i need to update the harddisk firmware first. or i shall choose WD green instead?

3) i dont know much about networking stuff, is it difficult to set up a NAS that meets my requirement?

thanks in advance!