Sorry for late reply. I have a brand new 2TB Time capsule and a mid 2010 iMac with 500gb HDD. I realised now that upgrading the TC to 3TB would come in handy and also I'm running out out space on my iMac. Do you think I can use the TCs HDD and put it in my iMac without running into the problem with the not working temperature sensor? You run into this problem when not using apple HDDs but this isnt the case when using the HDD of the time capsule.