While it can be a symptom of schizophrenia and schizoaffective disorder, hoarding itself isn't really a symptom of schizophrenia when by itself - just like you

While it can be a symptom of schizophrenia and schizoaffective disorder, hoarding itself isn't really a symptom of schizophrenia when by itself - just like you can have hallucinations and delusions caused by mental illness without having schizophrenia.