Exactly why I bought two, when I purchased mine above, keeping the second in reserve just in case. At the price I paid I really didn't expect a lot of quality control from the manufacturer nor do I expect a large MTBF (mean time before failure). I have had more than my fair share of USB drive enclosures go belly up at the interface between the drive and the USB crossover, looking like the drive had failed when it was only the electronics of the enclosure.
Good luck with the replacement.
Randy