Planning to get a new hard drive , i got a lot of important files and i feel i need to back up because my old laptop hdd (used as a storage hdd for pc at the moment) is 4.5 years old , still working no errors so far , avg idle temps at 38c most of the time , and i do some average copy and pasting activity . now my question is if i buy a new hard drive could i just simply copy and backup the files from the old hard drive to the newly brought one then when the time comes that the old hard drive fails, its the time when im going to use the newly bought hard drive to prolong its lifespan ? or should i use the newly brought hard drive right after i bought it so i could test it and savor the warranty ? i really want to prolong its life for like another 4-5 years max because im just a student and tight on budget. or is it just fine if i use it immediately after its bought.