Discover how Microsoft's Excel Copilot simplifies data analysis with natural language queries and boosts productivity. Excel’s AI Copilot ...

If you cannot open an Excel file and see Excel cannot open the file because the file format or extension is not valid error, see this post.

Learn how to change the default file format for saves in Word, Excel, and PowerPoint, so that you do not need to change it every time.

Supplementary informationThis document provides guidelines on submission of Supplementary Information (SI), including content of SI, the type of files we can accept, the size constraints for ...

When you're reformatting a drive, memory card, or flash drive you need to pick a file format. If you see FAT32, exFAT, and NTFS, but don't know which one to pick, here's what you need to know.