I have upgraded my 3 THD's to 1TB drives and they have been fine for 3+ years now. The one in the bedroom had a noisy fan so I replaced it. Other than that it has 1 issue that bugs me. I leave the tuners on different HD stations. Every few days they are both on the same station...like when you have a reboot. Sometimes I can hear the fan go into high speed, which I assume is a reboot. However, here is the strange part, this NEVER happens when it is doing a scheduled record and never happens during playback. I get NO FREEZES! I record the news at night at 11PM, and tell it to save 1 show. That way we can watch whenever we get in the Bedroom, and it only has 1 nights worth of news that gets overwritten the next night. From the deleted list I guess it does delete and records new. RARELY, when I just go to live TV on that station it will reboot, but that has only happened a few times EVER during these 3+ years. I would suspect PS and/or HDD but this seems like it would effect shows I record, etc. This seems like it must be something else. I suppose I "could" pull the HDD and run diags, but wonder if anyone knows what else to look for. Is it possible that the >250 deleted shows could be causing it? It sure would be a pain to delete them 1 at a time!