Can this adaptor be used between a Samsung S9 cell phone to transfer data to a thumb drive or to a laptop?

No, the adapter is not able to read the storage of the Samsung S9 phone.

Questions & Answers: USB C Adapter (2 Pack), Anker USB C to USB Adapter High-Speed Data Transfer, USB-C to USB 3.0 Female Adapter for MacBook Pro 2020, iPad Pro 2020, Samsung Notebook 9, Dell XPS and More Type C Devices

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USB C Adapter (2 Pack), Anker USB C to USB Adapter High-Speed Data Transfer, USB-C to USB 3.0 Female Adapter for MacBook Pro 2020, iPad Pro 2020, Samsung Notebook 9, Dell XPS and More Type C Devices

Anker Advantage: Join the 55 million+ powered by our leading technology
Space for Two: The ultra-slim form factor ensures there's space to plug two adaptors side by side into your MacBook Pro's USB-C ports.
Strong and Stylish: Finished in Space Gray and constructed from premium scratch-resistant aluminum, the adaptor not only blends seamlessly with your MacBook Pro but also withstands the wear and tear of day-to-day use
Superior Connectors: Engineered for enhanced durability, the male USB-C and female USB-A 3.0 connectors are designed to be plugged and unplugged up to 10,000 times-basically for life
Widely Compatible: Transform any USB-C port into a USB-A port and connect up a wide range of USB-A devices including external hard drives, phones, mice, printers, and more

$12^.99 –