I have created a document library named “K2 Workflow Library” in which K2 workflow will be created to copy document. Please refer to my previous article to create a K2 workflow in SharePoint 2013 Online.
Go to K2 designer, drag and drop Copy Document step from the Documents workflow steps in the ribbon interface.
Specify the document that has to be copied and then click Next button.
Specify destination site collection and then click Next button.
Specify destination document library and then click Next button.
Specify properties for the document to copy and then click Finish button.
Deploy the workflow. Upload a new document in “K2 Workflow Library” library. After few minutes the workflow will be completed and the document will be copied to the destination library “K2 Workflow Documents”.