Guys , I do time machine backups on regular basis and now I need to free up some space on my iMac HDD. Do you think it is safe to delete some folders from the HDD and to access them (with all files inside ) via the TimeMachine in a future ? I mean - to avoid keeping those folders on a separate USB stick . What is the maximum time of storing the backups in TimeMachine? .and if it reaches the maximum size - will it delay automatically some backups or will ask me ?