Hi there I really hope someone can help... Today, I went to backup my MacBook Pro files using Time Machine and my external HDD, as usual. Until today, Time Machine and the HDD have been running fine, and today I saw all backups in the HDD going back to September 2011. However, today when I tried to backup an error message came up saying there was not enough disk space on the HDD. Here's the error message: >>> Time Machine could not complete the backup. This backup is too large for the backup disk. The backup requires 299.79 GB but only 50.95 GB are available. Time Machine needs work space on the backup disk, in addition to the space required to store backups. Open Time Machine preferences to select a larger backup disk or make the backup smaller by excluding files. <<< Nothing would work. So I deleted 1 backup to free some space, but the same error kept coming. I deleted another backup...no go. Then all of a sudden all HDD in Finder is showing NO backups/files/folders...nothing!!! Time Machine still thinks all the old backups are on the HDD. So does finder, which shows the following for the HDD: Capacity: 159.7 GB Available: 50.95 Used: 108,747,599,872 bytes (108.75 GB on disk) Yet NO backups/files/folders are showing on the HDD under Finder and Time Machine won't recognise the old back-ups — ie, it says "Oldest Backup - None, Latest Backup - None" I've tried all sorts of things... including restarting, shutting down, repairing the HDD via Disk Utility etc and the tips here: http://forums.macrumors.com/showthread.php?t=1294299&highlight=time+machine But nothing is helping. I really don't know what to do next. (BTW, by chance, i did keep two of the old backups that I copied over today from the external HDD to my internal HDD) Any suggestions would be appreciated. Thank you.