Eu.txt — 1m

Run a script or use Excel’s "Remove Duplicates" (though Excel may struggle with 1M rows) to ensure you aren't counting the same person twice.

If the file contains columns like email:password or username:hash , it is likely a "combo list" from a data breach. 1M EU.txt

Before opening the file, you need to know what you are looking at. Use a "Plain Text Editor" (like Notepad++ or VS Code) rather than a word processor (like Word) to avoid crashing your computer with a large file. Run a script or use Excel’s "Remove Duplicates"

If it contains Name, Email, Phone, Country , it is likely a mailing list or a B2B lead database. 2. Legal and Compliance Checklist (GDPR) 1M EU.txt