Which is the best for daily work: SSD or HDD?

[mirjalal]

I have a 480 GB OCZ Vector 150 SSD with Windows 10 and I'm planning to buy the Desktop PC. This PC coming with 2 TB HDD (5400 rpm). HDD also coming pre-installed Windows 10. I'm using my computer every day (not for work). So, which option is the best using these storage devices for daily work after buying new PC:

■ Using SSD as primary memory and HDD for storing files/documents and etc...

or
■ Using HDD as primary memory and SSD for storing files/documents and etc...

Please help to choose a best suit variant for me.

p.s I'm new to this community, so, if question out of topic and/or bad English.

Thanks

 

[USAFRet]

SSD for the OS and applications. No question.
Other stuff goes on the HDD.