ArrowInvalid: Parquet magic bytes not found in footer. Either the file is corrupted or this is not a parquet file.
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## Describe the bug

When uploading a relatively large image dataset of > 1GB, reloading doesn't work for me, even though pushing to the hub went just fine.

Basically, I do:

```
from datasets import load_dataset

dataset = load_dataset("imagefolder", data_files="path_to_my_files")

dataset.push_to_hub("dataset_name") # works fine, no errors

reloaded_dataset = load_dataset("dataset_name")
```

and it returns:

```
/usr/local/lib/python3.7/dist-packages/pyarrow/error.pxi in pyarrow.lib.check_status()

ArrowInvalid: Parquet magic bytes not found in footer. Either the file is corrupted or this is not a parquet file.
```

I created a Colab notebook to reproduce my error: https://colab.research.google.com/drive/141LJCcM2XyqprPY83nIQ-Zk3BbxWeahq?usp=sharing


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