Hello   @japz1409

Thank you for the feedback, if the SD card Loop recording has worked fine before, you could reboot the Tapo camera first. 

 Reboot the Tapo camera : Tapo APP > tap the 'wheel ' icon on the right top of Live view page.

- Check the SD card status and make sure the SD card status good/ could be formatted.
- Confirm the firmware of the Tapo camera and the Tapo APP version are both up-to-date.
- Go to Tapo APP Camera Settings > Recording Schedule, Motion Detection /Continuous recording, make sure all the time blocks have been selected there.
- Verify the SD card with H2testw software and share a photo with the test results  (back up important files before run the test)
https://www.tp-link.com/en/support/faq/2592/ 

If still the same, can you share some information for us to look into this further. 
 1) a photo of   recording schedule settings, 2)  Model of the camera, please share the Mac address of camera by private message 3)  brand and capacity of SD card , SD left capacity on Tapo APP & H2testw test result  4) Tapo APP version 5) Model of your phone or its Andriod or IOS version 

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Hello   @japz1409  May I know did you get the problem solved? Feel free to let us know for any further observations. Thanks!