> No, they all will have the same exact capacity, brand/model doesn't matter, except some drives that come from USB enclosures.
I'm not sure how all manufacturers in the world, for all the drive models, would all make them *EXACT* the same size for all their 4TB drives.
All the same number of platters, all the same number of sectors, all the same 'bytes per sector', same storage density, all CMR, all SMR, etc.
I'm sure "some" would be a few bytes (or kbytes) bigger or smaller.
I have no idea why the same drive put "inside" a computer, would be a different size than the ones they put into "external cases".
Do they have totally different assembly-lines making "drives for inside computers" VS "drives for external cases"?