Hello @Lucmuc 

We have an instruction that might do some help, please give it try: What should I do if the SD card doesn’t work properly on my camera?

As a temporary suggestion, you could back up the SD card content in a computer, later try to format SD card in Tapo APP

May I know is there any error message on app when SD card is full, can I have a photo of it. 

If it's a Fake memory card , tapo camera may also have trouble reading or overwriting it.
Verify if SD card is Fake (expanded capacity)with H2testw software and share a photo with us
NOTE: back up important files before run the test
https://www.tp-link.com/en/support/faq/2592/

@Lucmuc 

Please make sure you have  enabled Loop recording:  Tapo APP>Micro SD card>Loop recording, when SD card is full, it will start to overwrite the oldest footage.

Related FAQ: How can I view 24-hour recordings of Tapo cameras in Tapo app?

Hello @Lucmuc 

Thank you very much for the photo, can you help translate the message on Tapo APP.

We would like to escalate the case and investigate further,can you help provide information here to

• brand & storage of the SD card
• a photo of the SD card
• Verify the SD card using H2stw software and take a photo of the test result

Thank you!