I use Time Machine, Arq and Amazon Cloud Drive: - I have an external HDD partitioned in half: One half is for large external files that don't change much (raw

I use Time Machine, Arq and Amazon Cloud Drive: - I have an external HDD partitioned in half: One half is for large external files that don't change much (raw files, archived data etc); and one half is a dedicated partition for Time Machine - Time Machine backs up my laptop. If I lose my computer but not my hard drive, I can get a new one and seamlessly get the computer back to exactly how it was when I last backed it up, open tabs and all - I also have Arq running, attached to Amazon Cloud Drive (cheapest external storage I know of). It backs up both selected portions of my laptop's disk, as well as the external hdd's non-timemachine partition (due to how TM works you can't really back it up to the cloud[1]) to "the cloud" This leaves me with: - Three copies of my laptop data: in the laptop, in an external hdd and in the cloud - Two copies of larger data that can't fit, in the external hdd and in the cloud. My external HDD lives at home. [0] Time Machine backups up once an hour, and stores backups as a simple directory structure on disk of your entire hard drive, except using hard links to old backups to avoid duplication. It keeps the last 24 hrs of hrly backups, the last 7 days of daily backups, and then weekly backups until it runs out of room. This format simply doesn't work with the kind of backup where it scans a directory to see what's changed, because it effectively looks like you're adding hundreds of gigs of data each hour.