Samaratin :
He said "Keep his OS and Games on the SSD..." which implies they are already there... and move other stuff to the HDD... dragging and dropping from a folder on ssd to hdd will copy from one drive to the other... nothing dangerous about that at all....
You may be correct.
But there are thousands of other people who may read this in the future.
With little context other than 'just drag and drop', and not a lot of direct info from the OP....some future user may hose up his system.
'other stuff' = what 'other stuff', specifically?
There are several way to do this manually or automatically. But first let's find out exactly what we're talking about.