Yes, that is a 2.5" HDD with a 9.5mm thickness. The 860 Evo and almost all other 2.5" SSDs are only 7mm thick, so it will definitely fit. Depending on how the drive is meant to fit into the system's HDD bracket, the thickness difference MIGHT mean you'll have an air gap between the SSD and one of the bracket surfaces, but based on the diagrams in the Inspiron 3542 manual here, I don't think that will happen. Even if it does, that isn't actually a problem as long as you screw the SSD in tightly and make sure the SSD's SATA connector aligns with the motherboard. Good luck!