Saved contacts can be exported as a vCard file to the internal memory, memory card or SIM card. The .vcf file can then be copied and imported to other devices. The file can also be sent by email, WhatsApp or other services.

Android 10 (One UI 2.0)
Step 1:  Open the  Contacts -App
Step 2:  Open the  menu
Step 3:  Tap on  Manage contacts
Step 4:  Tap on  Import or export contacts
Step 5:  Tap on  Export
Step 6:  Choose the  Location
Step 7:  Tap on  Export
Step 8:  Confirm with  OK
  1. Open the Contacts-App
  2. Open the menu
  3. Tap on Manage contacts
  4. Tap on Import or export contacts
  5. Tap on Export
  6. Choose the Location
  7. Tap on Export
  8. Confirm with OK

Samsung Instructions