I need advice on how often to make a new full backup. I have a full backup and now a string of 30 or so incremental backups each about 10% of the size of the full backup. Can I automate making a new full backup every two weeks and incremental backups daily? Is this the best way to go? Are the incremental backups cumulative, or do I need each of the preceeding 29 incremental backups to recreate the disk from the full backup and the most recent incremental backup? Thanks for any insight.