Parquet Content-Defined Chunking (CDC) is now integrated with PyArrow and Pandas, allowing efficient deduplication of Parquet files on content-addressable storage like Hugging Face's Xet storage layer. This feature significantly reduces data transfer and storage costs by only uploading or downloading modified data chunks, streamlining data workflows. Demonstrations highlight its effectiveness in various scenarios, including adding or removing columns and re-uploading identical tables without incurring additional data transfer.