Pretty sure they all get the same amout of overwork . Also , smaller employee numbers typically mean that they can ' t get as many projects done concurrently without sacrifing quality . SM , on the other hand , has proven themselves capable of just packing a full calendar year with song releases and comebacks with no real issue , which is great for revenue , without sending ALL of their acts on extended foreign tours . <| sep |> Be on the good side of Dean he won ' t be angry with you later . <| sep |> You can find the specs either at Apple at the later is much more convenient if your looking for specs on a mac model that Apple is no longer selling . Under Apple menu About This Mac Storage you should be able to determine what type of HD you got . Apple lists the drive options of the 21 . 5 iMac Late 2015 as Hard drive , 5400 rpm HDD Fusion Drive SSD HDD Flash storage SSDHard drives come in two sizes 3 . 5 and 2 . 5 . The larger size is normally used in desktops and usually runs at 7200 rpm while the smaller size runs at 5400 rpm . The smaller 2 . 5 size uses less power so is common in laptops and external USB HDs to avoid needing an extra power brick and cable .