Below is the sample delta files downloaded using Download_Only function in FDSLoader.

We have included all files, except for files containing "prices" word in file name, in collecting the unique fsym_ids.

80,628 fsym_ids are collected for attached file.

Run FDSLoader in Download_Only mode and wait while it finish.
Take zip file in zip folder and unzip it.
Open txt files which ends with '_update.txt' and not contains 'prices' in filenames.
Read files as csv and try find FSYM_ID column. If found store the fsym_id values into temp list.
Do steps 2-4 for each zip files in zip folder.
Apply DISTINCT rule for resulted list to avoid duplications.
Move all files from zip folder to some storage.

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