For copying an object greater than 5 GB, you must use the multipart copy. Use the multipart upload API to create an object, and use the Upload Part - Copy API to carry the x-cos-copy-source header to specify the source object. The process is as follows:
SDKs provided by COS can be used to easily implement multipart copy.
You can use the REST API directly to initiate a multipart copy request. For more information, see the following API documentations:
You can call the multipart copy method in the SDK directly. For more information, see the SDK documentation for the corresponding programming language below: