So regarding costs and benefits, there are no reasons to keep SSDs (even HDDs) in a default 3.5' form factor, but if you really want to install a 2.5' SSD or HDD into your desktop, you could just use an 3.5' adapter such as this:Īs already mentioned, it a simple design choice. Even though, 2.5' generally offers the same features such as speed and data capacity like the 3.5' ones.Īlso, thinking of HDDs (this does not apply to SSDs), it also has increased energy efficiency (less power consumption): The 2.5' form factor presents a lot of benefits when compared to 3.5' ones: they are smaller, lighter and cheaper (require less materials to manufacture such as aluminum and plastic). There are 3.5' SSDs available, but they are not common:
There is no need to “artifically” produce a bigger case than necessary. The technology easily fits into a 2.5' case. The 3.5' versions could only be used in desktop computers. 2.5' variants can be used in laptops and desktop computers which makes them more flexible.
It is cheaper to produce just one version, instead of two.