Raw and processed PDF, electrochemistry and ssNMR data along with corresponding metadata for all measurements published in the paper "Mechanistic insights into sodium storage in hard carbon anodes using local structure probes." Specifically, we provide PDF data as .hdf5 (raw unprocessed) and .xls (processed) files, electrochemistry data as a .mpt (plain text) file, and unprocessed NMR data in the IUPAC standard JCAMP-DX format, processed data available as .csv. We refer the reader to the aforementioned paper for further details.