You can import or export files (in vcf format) to or from your devices USB storage or a memory card in Samsung Galaxy S3.

Import contact files

• In the application list, select Contacts and tap on Contacts.
• Press the Option key and select Import/Export, tap on Import from SD card or Import from USB storage.
• Select a memory location.
• Select an option for importing a single contact file, multiple contact files, or all contact files, and then select OK.
• Select contact files to import, and then select OK.

Export contacts

• In the application list, select Contacts, and tap on Contacts.
• Press the Option key and select Import/Export, and tap on Export to SD card or Export to USB storage.
• Select OK to confirm.