How Do I Copy Data from Development Environment Notebook A to Notebook B?

Data cannot be directly copied from notebook A to notebook B. To copy data, do as follows:

1. Upload the data of notebook A to OBS.
2. Download data from OBS to notebook B.

For details about how to upload and download files, see How Do I Upload a File from a Notebook Instance to OBS or Download a File from OBS to a Notebook Instance?