Follow the steps below to transfer contacts from Samsung Galaxy Tab S3 to a Computer.
Step3: Tap Options button on the top right corner and then choose Import/Export option.
Step4: Then select “Export to SD card”
Step5: Then click Ok and your contact list will be backed up on sd card in .vcf format as a single .vcf file having all contacts.
Step6: Upon connecting to the pc this file can be seen in the root folder as 000##.vcf. This file can be now used for backing up contacts and restoring them later.
Step7: Copy this file to your desktop and use it to restore contacts later.