If I needed to, I would put in a 2,5" SSD in a suitable caddy, which mimic a 3,5" enclosure. Example. Because SSD's are silent, draw much less power, and, above all, are more reliable than HDD's these days. Also not as expensive as they used to be. I am perfectly aware that it won't increase the writing speed, but that is certainly not the only advantage with SSD's.