The service does not provide a feature to bulk download multiple files, such as all of the files attached to a specific app. Files can only be downloaded one at a time.

As a workaround, it is possible to use an API to download attached files in bulk.

You can find information on APIs, including API manuals and sample code, on cybozu developer network. Please refer to the following pages. (Only available in Japanese.)

• kintone command line tool (cli-kintone)
• Downloading all attachments in kintone at once using JSZip
• Two steps you need to perform when downloading files

If you have any questions about APIs, refer to the following page.
Inquiring about APIs, customization, or extensions