@C8_Vette 

A few things to first consider or check:

How long do you normally see your 24/7 Recordings last? Is it possible that it was deleting old footage due to storage space? The Tapo 325WB has a much higher quality than the C111 and I think that you were beginning to approach the capacity of the card. If the devices were setup at a similar time, or were rebooted at the same time, it may just be that the cameras happened to sync up in their deleted footage.

If you believe that the recordings should not have been deleted yet, I would recommend removing the SD card from the cameras and checking to see if the recordings are available from a PC. I would also check to see what the overall available disk space is of the SD card, to see if it was deleting due to this.

  @C8_Vette,

I would normally agree if it wasn't just one day that was left before the deleted period. There may be something different that prevented that file from being deleted, such as how a file in use cannot be deleted.

Did camera three have the same video quality settings and still have those days' recordings?