Currently the Web Report Designer (WRD) can only work with reports stored on the server where the WRD Web API service is hosted.

A nice addition would be the option to select a local TRDX/TRDP file from the client file system and upload it to the server, when opening a new report for edit.
When saving such report there should be an option to download it to the client's file system as well.

With this approach the open/save operations will more closely resemble those of the standalone report designer.