We support all common spreadsheet formats:
- Google Sheets (sheet tabs with less than 700,000 cells. Check the size)
- All kinds of Excel files (not larger than 8MB)
- CSV and TSV (not larger than 8MB)
- Open Document files (not larger than 8MB)
These files have to reside inside either Google Drive or Microsoft OneDrive. If you want to connect to your local files, you have to sync them with Google Drive or OneDrive first. For Google Drive, you can use Google Drive Desktop or Insync. For OneDrive, use OneDrive Desktop.