The name suggests a few possibilities depending on your context:
It may be a localized dataset or a collection of public records (like ZIP code data for a neighborhood like Coney Island ) bundled for download. File: Capital.Island.zip ...
If this is a business-related file, you can check the SEC EDGAR database for official corporate reports using "Capital Island" as a search term. The name suggests a few possibilities depending on
No public files or specific documents under the name were found in verified government databases or official repositories. Files with "Capital" and "Island" often relate to
Files with "Capital" and "Island" often relate to municipal infrastructure in places like Providence, RI , or territorial records for the U.S. Virgin Islands .
If you have a link to the specific page where you saw this file, providing it will help in retrieving the text. Otherwise, knowing the source would allow for a more targeted search.