You can create a backup of the records in an app using the "Export to file" feature.
Note, however, that it is not possible to create a backup of all the data in kintone at once.

Exporting records to a CSV file enables you to restore the records by importing the file. This is helpful when you have accidentally deleted the records.

For details, refer to the following pages:

• Exporting Data to a File
• Importing Record Data from a File into an App

With the Template feature, you can back up settings of your app or space.
Creating a template of your app or space enables you to create an app or space with the same settings when, for example, you have accidentally changed the settings.
For details, refer to the following pages:

• Information on the App Template feature:
  • Creating a Template from an App and Registering the Template in kintone
  • Downloading App as Template
  • Settings That Are Not Included in App Templates
• Information on the Space Template feature:
  • Creating a Template from a Space
  • Data That Is Included in or Excluded from Space Templates