I did a full reset yesterday. I followed all the instructions correctly, and everything went to plan. TM started to backup, the menu icon revolved and my external hard disc flickered and hummed - all good signs! - for about 10 seconds, then everything stopped. I checked in TM Star Wars and found the first full backup date had moved from March 16 to March 29??? Then I saw the TM menu icon had an exclamation mark in the centre of the arrow, I clicked on this and had the message "Backup delayed", then backup started again and then stopped again after a few seconds. Finally a few minutes later I had the message "successful backup" This morning I have no popup telling me that TM hasn't backed up so I am crossing my fingers that this has solved the problem, though I imagine it is too soon to tell. If it comes back I will let you know. Oddly, the first backup date (according to the Star Wars) has remained at 29 March.