Oh I see, if I change with fsspec.open(os.environ['PANGEO_SCRATCH'] + '/test', mode='w') as fp: to '/test2' I’m able to write the file, sorry I misunderstood that. Similarly, going back to the rechunker example, I was just changing the filename (e.g., temp_data_8.zarr to temp_data_9.zarr) when I should have also changed the folder name (e.g., rechunker_demo) to avoid overwriting previous data. As for the delete permissions I’m fine with however the community decides @choldgraf, but it might be nice to have personal access, as suggested by @jbusecke. Thank you!