Well, there’s a INaturalist_Train/2021_train.tgz. But I deleted it and tried re-downloading, and the same error occurred at the end of the download. When I try running, I get:
File "/u/slerman/miniconda3/envs/env/lib/python3.8/site-packages/torchvision/datasets/utils.py", line 152, in download_url
raise RuntimeError("File not found or corrupted.")