I agree with USAFRet.....256GB is a large SSD.....I have installed two of them in computers, the others have all been 128GB. The OS and a few select programs really benefit from the SSD - other programs don't benefit as much, and given the price of the SSD as compared to a HDD, you should be selective as to what you install on the SSD.
On my laptop, I removed the 1TB drive that was in it, and placed a 128GB Samsung 840 EVO - plenty of room for Windows 8.1, Microsoft Office and a few programs (still over 60GB free). I placed the HDD in a USB3 enclosure and permanently save files there....
Of all my computers at home, only my main rig has a 256GB - and I am only using about 90GB on it....should have put the 128GB in.