Yes, you can install an M.2 ssd in 7050 SFF and install OS on it to make it a boot drive, and also use a 3.5” HDD as secondary drive for storage. the hard drive space in SFF has room for either one 3.5 hdd or two 2,5” ssd/hdd.  You are correct that the drive cage has no space for one 3.5+one 2.5 sata ssd. there is a way to get around this space limit, but you would need to remove the dvd drive and install a 2.5” caddy adapter in the dvd slot.  You can install os on the 2.5 ssd and make it a boot drive.  remember to connect sata to black or blue sata port on motherboard which are faster than the white sata port reserved for mechanical dvd. [IMAGE]  
Hi everyone, I am trying to find out if I can use an M2 drive as the boot drive and a 3.5" HDD for storage in one of these machines. I will be using the boot drive for the OS and some software and the 3.5" HDD will be used as a storage drive for my security camera software. The 3.5" HDD will be a surveillance drive used just for storage. The PC will be mainly used for my security video software and footage storage.   I was hoping to be able to use the 2.5" SSD it comes with and add the extra 3.5" drive for the video storage but I did some looking around and it seems like I can't fit both those types of drives in this form factor.   Any useful information and input will be greatly appreciated.   Thanks in advance.
Optiplex 7050 SFF - Will these drives work?