Toshiba's 2TB external hard drive fits in this case with one inch of headroom. There's a mesh side room that offers plenty of room for a cable and maybe a few small items. I assume any external drive about 1/2-3/4 inch thick will do. The case is lightly textured and stiff enough to protect with a slight bend. It closes seamlessly making it a great little holdall. I found that I have a 500GB drive in a similar case. mine with "silver" marking. Highly recommended
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