i just format twice a year, never defrag, my 2nd disc where i download all my files to isnt fragmented one bit even after months of downloading. My pc works just as fine as ever and it hasnt been rebooted for the last 3 months . Never experienced any problems with this and i'm an avid gamer, my games load just fine, and play just fine.
that's not neccesary true, because that drive isn't an OS system or gaming drive, the files are put in order. now that order will change when you add and delete files, but not much.
it takes me less than 5 minutes to defrag a non os drive (it will almost move nothing).