Your Salesforce data can be copied to CSV files, although most customers use a database as a repository. Replication is typically incremental, which would capture only changed records. You could do a full copy every time, but this would take a long time and would potentially cause you to exceed your daily API limit in Salesforce.
There are some metadata objects that are backed up, but we don’t guarantee that you could recover your org from the information captured. There is no utility provided to recover the metadata.