As some reviewers have noted, however, do not fit any 2.5 "hard drives clean. The Iomega Prestige Portable is a bit too long, the TrekStor DataStation pocket gu fits perfectly into it, but should also not be a bit longer or wider. For everyone who want to compare their model: the TrekStor is about 12.5 cm long, 7.8 mm wide and (including rubber feet.) 1.8 cm high.
If you have a hard drive with the right dimensions, I can this bag but definitely recommend.