I bought this case to hold my Seagate Expansion 1.5 TB USB 3.0 HDD (STAX1500102). It fits perfectly, snug with no room to move around. The cable also fits just right in the left side sleeve. The fact that the case is hard means it is great for travel and means no worries when putting it into a backpack or carry-on. 

Question: How is the case?
Answer: It fits perfectly