It sounds like your 750GB drive isn't to be trusted. Those drives have a 3 year warranty. perhaps you can get an RMA from WD? Hopefully you have the original TiVo drive on the shelf. The housekeeping question is a good one...however I've never noticed much of a difference between drives with respect to updating SP's, etc. Actually your old drive was faster so in theory going to a GP drive would slow things down, but again, I've never seen much difference either way. Some adjustments just seem faster than others and I think that depends on the number of updates that have to be made plus the communications with TiVo's servers. In other words, shows that have a lot of data (many scheduled recordings) tend to take longer to move, delete, etc. than those that have a smaller amount of files. I'm sure how the changes affect other recordings, where each is with respect to priority and other considerations have an impact as well. However if it's working faster...that's always a good thing.