I have a Seagate 1TB external HDD for backup after 5 months of using it since the new year is it full! How can i delete previous backups and keep the current and latest version of Time Machine Backup? I was a bit confuse i thought it backup only the latest one and deletes the one from a month ago or so. Any advice will me much appreciate. I don't want to go out and buy another one i have 2 one for my facebook and photos backup and one for the time machine.