✓Senior Data Operations & Spreadsheet Analyst
📍 Chicago, Illinois, United States • Contributing Writer & Systems Tester at TechOps Wire
Sarah Blake is a data operations analyst and business intelligence specialist based in Chicago, Illinois. With 3+ years of professional experience in operational analytics and financial modeling, Sarah helps teams eliminate data discrepancies, build dynamic Excel workbooks with XLOOKUP and dynamic arrays, and establish clean spreadsheet validation rules. She focuses on non-destructive data cleaning and reliable formula architecture.
🛡️ All tutorials authored by Sarah Blake undergo hands-on verification on clean test machines and live spreadsheets before release.
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How to insert bullet points in Excel cells using numeric keypad shortcuts, custom number formatting, dynamic CHAR formulas, and Symbol dialogs.
How big of a file can you upload to ChatGPT? A practical breakdown of file size limits, row count limits for CSVs, and how to work with large PDFs without errors.
How to add drop-down lists in Excel to prevent typos and speed up data entry. Step-by-step instructions for simple lists, auto-updating lists, and dependent menus.
Clean duplicate rows in Excel using conditional formatting to highlight duplicates, the built-in Remove Duplicates tool, or the non-destructive UNIQUE formula.