Anyone know if this has an open slot to add another hard drive? I was just about to buy an 840 G3 with a SSD + 1TB HDD
This has both already so it makes sense that you could. Just have to use a compatible hdd.
The specs say that it has a SAtA SSD and an M.2 slot so: the SSD slot is already in use but you should be able to add an M.2 NVME drive but NOT another SSD.