Is it safe to put a mechanical HDD on a caddy with the ASUS K555L?

[jcdumaguing226]

Resorted to finding another way to fix my friends laptop. I've seen a video wherein he added a secondary drive (an SSD) using a caddy however he said that I shouldn't but using a mechanical HDD because for some reason, the K555L cuts power to it.

 

[phaelax]

yea why wouldn't it be safe? Without the caddy, what's going to secure the harddrive in place inside the laptop?