@Kielegie 

Hi,
You can try the following steps and check if they will help.
Turn off the camera, remove the microSD from the camera, insert the microSD card again, turn on the camera, and check if it can be recognized.

Please help confirm the following information if the problem remains.
1. What's the model number and format of the Samsung microSD card?
2. Insert the microSD card into a computer with an SD card reader. Check if the microSD card can be recognized by the computer and test the card with third-party software such as H2testW to ensure the microSD card is good, and let me know the test result.
3. Insert a different microSD card into the camera for a try if you have one.

Best Regards

  @Kielegie 

Hi,
Based on the test results from the H2testW tool, it appears that your microSD card is not working or it is a fake SD card.
How to Verify Fake Micro SD Cards?

Regarding Samsung EVO series SD cards,  you can check on the Samsung official website>Warranty Section, it states the warranty does not extend to surveillance cameras and other write-intensive uses, we also have an FAQ explaining that Samsung EVO series SD cards are not compatible with our cameras, so we do not recommend using a Samsung EVO series SD card in our cameras.
General Information about using MicroSD Cards with TP-Link’s Kasa or Tapo Cameras?
 

For your reported issue, it's suggested to refer to the above link to find a microSD card that works with our cameras. When purchasing a microSD card, it is recommended to choose an official high-endurance SD card and go to its introduction and warranty pages to see if it is mentioned that the microSD card is not suitable for cameras.

Best Regards