The advantages of ready built variant can also be seen here: The aluminum case dissipates heat protruding from the external hard drive looks indestructible and feels even so, there is an on-off switch and the rubber feet for sticking inhibit any vibration. The DIY variant additionally has the advantage that you can choose the built-in hard disk itself, and has also not described defects of prefabricated variant.
Conclusion: When it comes to demand for external memory, my choice always falls on this case - particularly since the assembly is a cinch.
PS: My tip for choosing the hard disk: Western Digital Caviar Green 1.5TB or Samsung Spinpoint F2 ECOGREEN 1.5TB. With good quality so you get a very good external hard drive, which is often even cheaper than the prefabricated variant.
