By default, CrashPlan service backs up your entire system to the Stanford Internet2 Cloud, excluding certain file types and directories. Virtual machine files, log files, most application directories, the operating system and other file types are excluded. Users can still choose to back up these files using external storage or to other computers in their account.
Still other files and directories are always excluded. Global exclusions include caches, ephemeral data, temp directories and incompatible file types. Additionally, any file or folder named _NoBackup will always be excluded.
This exclusion list only applies to organizations that subscribe to the ITS settings and configurations.
Groups that locally support their CrashPlan deployment may have different includes/excludes. Check with your local IT support group for more information. Some exclusions are specific to Macs, Windows, Linux or Solaris. See what gets excluded per CrashPlan best practices.