By default, the McAfee Online Backup backup software backs up automatically.
Automatic backups occur when your computer meets specific criteria such as how long has it been idle. You can back up on a schedule instead of automatically, and you can start backing up manually any time you like.
If you cannot change this setting and you use Windows, you may be able to resolve this issue yourself. For more information, see If Settings Are Greyed Out in the McAfee Online Backup Backup Software for Windows. You may not be able to change this setting if your account administrator is managing it for you.