Hi,
‘.qdrep’ is the report file name suffix used by older releases of Nsight Systems. In recent years Nsight Systems changed the report file name suffix to ‘.nsys-rep’. Backwards compatibility is retained and Nsight Systems can load report files with either suffix.
I’ll add as a note, that if you are getting .qdrep results your version of Nsight Systems is years out of date. I would strongly recommend picking up a newer version if you are able.