If its as you say, then you are OK.  
Hi all I hope this doesn't offend those of you that like a tidy inside of your computer. Basic question: I have just bought a 2.5" 500GB SSD for my Inspiron 3650. I'll use it for the OS and most apps / files, but will keep older photos on the original 2TB HDD. I'm getting the relevant cables (I have the SATA data cable, have ordered a power splitter). I can see that there is space in the chassis for the drive but all the forums talk of needing a caddy to contain the ssd before physically mounting in the box. My question is, as this is a static desktop, never moved around, sits on the floor of my study, is there any reason the drive can't just rest in the space that is designed for these additional drives? Obviously it wouldn't be securely attached to anything, but it's got no moving parts and I'd ensure the cables were well away from fans etc. Is there anything mandating the plastic holders that you can get separately? Thanks v much. Will
2.5" upgrade