When you work with .csv files in Microsoft Excel on a Windows PC, you will see a message "POSSIBLE DATA LOSS", this is because, CSV is a plain text format and doesn't support advanced formatting, formulas, multiple sheets, or other Excel-specific features.
There are two things that you can do here.
Fix 1: You can save the file as .xlsx or .xls instead to .csv
Fix 2: If you do not expect to have any formatting or formulas in your CSV file then you can ignore this message.
How to remove "POSSIBLE DATA LOSS" Warning
- Go to File.
- Select Options.
- Now go to Save from sidebar.
- Uncheck - "Show data loss warning when editing comma delimited files"
- Click OK
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