If not managed properly, large datasets can be difficult. To avoid export problems, email clients such as Outlook and Apple Mail require properly structured VCF files. Before conversion, organize your Excel data and remove unnecessary fields. And use the professional tool, the ToolsBaer Excel to vCard Converter, which creates VCF files that are compatible with major email clients, making the import process smoother. For very large contact data, it can be seamlessly handled in VCF files using it. After importing, review contacts to ensure all fields are synced correctly. It can take some time for email clients to load large contact lists, so be patient. Even big datasets can be easily transformed and maintained with the correct strategy.