There's more to "day-to-day operations" than backups. The reality is that Google is much less likely to damage or lose your data than you are, but it's always

There's more to "day-to-day operations" than backups. The reality is that Google is much less likely to damage or lose your data than you are, but it's always good to keep extra copies around locally. This is important for many reasons, like access when either Google or your whole net connection is unavailable, and more flexibility with the data.