I have a Seagate Expansion 4T hard drive. The sleeve fits the disc perfectly. What I like about the case is that the foam insert fits very snugly. When you insert a disc, it doesn't move at all. The exterior of the case is made of a soft-touch material, which gives me confidence that the case can take a decent drop without damaging the drive. I'm looking at some other cases and most of them don't have a foam insert. I had to remove part of the foam insert as it was pre-cut for the smaller drive. However, Seagate's Expansion series already has perforated foam, making it easy to peel off the foam. Overall, I'm very happy with the case, especially considering the low price.
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