With a little "McGyver" you can fit a 2,5" SATA disk or SSD. The 3,5" to 2,5" reduction frames hold the HD smack in the middle of the frame. Normally the cabels are too short, then. But you could build your own frame or even use double sided tape. I'm doing this job to my own iMac tonight, because the 3,5" drive fittet now is too noisy.