I've been using Time Machine (TM) and I've made a lot of changes the past few days trying to backup my Microsoft Outlook User Data (backup Outlook 2011). I took a TM backup last night, I think it was about 20GB if my memory serves me correctly. I need to do another now as I'm about to try another restore of my Outlook 2011. I'm getting an alert 'backup too large for the backup disk. Requires 266GB but only 90 GB available'. Which seems crazy; so I've deleted the previous TM backup by dragging the folder to the Trash and it has not seemed to have an effect. I'm still unable to do the backup. Anyone recommend anything here?