the hard disk is held by elastic, the hull may fall, it is the shock waves that will damage your SD. Against moisture, there, I'm not convinced, even if the hull is to be stored in turn in a trolley suitcase, office or travel. So I recommend this tip: keep the desiccant sachets supplied with electrical appliances and keep one or two for your DD in its hull. This should prevent condensation from forming. PS: I just do the test that kills. HDD 2.5 inch brand new Samsung was placed in the hull, maintained by the elastic. I closed it with his zipper, and I dropped the whole 160 cm tiles. Then rebelote but 60 cm on an oak table. Result: DD works perfectly, it is also trying to save the computer quietly content. So yes, there are better, definitely; but all testing is to be performed depending on the manufacturer's price, and for 9 euros, this semi-hard case responded perfectly to the tests, and the Samsung S2 Portable 500 GB 3 comes very well in and not moving; and met him a commercial success. For tight budgets the system D: keep the tape foam packaging of your past and slide in addition to DD. PS: I have seen a model of another brand, which cost one euro more and did not offer pouch compartment for the USB cable. So much for those who find me biased.