How to format EXT4 (or best format) and best hard drive?

Yes. What i’m referring to basically is that in the lower capacity My Book’s you will usually have lower end drives in them (which are still just fine for most applications). As the lower end WD drives currently are not manufactured in the 8TB and larger sizes what those units contained in them so far have normally been either a red, or a white label red variant, with many of the current ones being the helium filled ones. I have had a good track record with these drives and I prefer that they are running slower (cooler/quieter) than most of the offerings found elsewhere.