Supplementary material to DESI's publication 'The dark matter content of Milky Way dwarf spheroidal galaxies: Draco, Sextans and Ursa Minor'. All data points for the figures are provided in corresonding csv files. In Fig7a/b/c.csv and Fig10a/b/c.csv, the 'x1' and 'y1' columns correspond to x-(in units of arcmin) and y-values in the first panel from the left, the 'x2' and 'y2' columns correspond to those in the second panel from the left, and so forth. v3 changes: A new file Fig3_MGE.csv is added, which contains parameters of MGE for surface number density profiles in Figure3. The physical meaning of each paramter can be found in the text after Equation4. Fig11.csv and Fig12.csv in the last version have been renamed as Fig11_J.csv and Fig11_D.csv to follow the latest version of the paper. These tables contain the values of J and D factors, which are not changed in this version. Fig13.csv and Fig14*.csv have been renamed as Fig12.csv and Fig13*.csv to follow the latest version of the paper. The column names (and also the file names) have been improved for better identification. The values for Draco and Sextans in Hayashi2020 have been updated, kindly provided by Kohei Hayashi.