Advertisements Two+ year old Stock S3 unit... with it's limited HD capacity. The first unit suffered infant mortality, failing in the first month, this one has gone without a hiccup. How long do they typically last? I purchased a three year service contract on this unit, which should be up next september. Do I wait until it fails, be proactive and install a larger drive, or just upgrade/update next fall? There has been no sign of failures, although have had some issues with my OTA signal that I think has something to do with stations moving their broadcast locations and dropping output power.