Today i bought a hard drive and am wondering that if I can use it with my super slow hard drive which is 2-3 years old.The reason of changing that hard drive was because it was affecting some games like watch dogs,skyrim etc cuz they use significant amount of data form you hard drive in spite of using the data from the ram.So my question is will it be better to use the new hard drive only or using that super slow hard drive with the super fast one??