Mac OSX Backup

Hi community,

I need some recommendations for backup software - preferably free but open to pay for something.

I use Time Machine to backup to a 2TB G-Drive right now and will probably keep using that for regular incremental changes, but as many may know it isn't a full system bootable backup option, which is what I am looking for.

I would like a system I can leave to run every week or two (or four?) to make a full backup that will be replaced each time.

So yeah, help please.