Amazon Com Sabrent 3 5 Inch To X2 Ssd 2 5 Inch Internal Hard Drive Mounting Kit Sata And Power Cables Included Bk Hdcc Electronics 11/9/ Compare 35 and 25inch SSD, as for the difference between 25 and 35 SSD, the biggest difference is their sizes And, 35" SSDs are mainly used on Desktop while 25" ones are for laptops Also, the two sizes of drives are different in storage capacity, power consumption, cache size, RPM (Revolutions Per Minute), data transfer speed, etc Power draw of an SSD vs 25" notebook hard drive to power the HDD and a USB reducing energy used to complete a given task much more significantly than peak power consumption numbers may 2.5 vs 3.5 hdd power consumption