i am building a historical adjusted price dataset for backtesting couple of strategies and on NSE’s website they list this zip file CM-Bhavcopy (PR.zip) which contains the file Bc140825 which is for the date 14th august 2025 and contains corporate action information for each Symbol such has dividends, splits, Bonus etc. I am trying to download historical ones but for some reason i am unable to download pre-2010 files
Is there some way to get these files for dates before 2010 or some other file that nse used for this information ?