I have two Vigi C540w cameras, both currently using micro SD cards to store videos. However, whenever the storage becomes full, the cameras can no longer detect the memory cards. I have to remove the cards, clear the files, and reinsert them to make them work again. Files with names starting with "xxxxxxxx" cannot be read, which makes me suspect a potential firmware issue. It seems the cameras are unable to automatically delete old files when the storage is full, or there might be an error with the file naming that causes the memory cards to become undetectable. This situation has been ongoing for several months, leaving me very disappointed.

Another issue is that, even when the cameras detect vehicle or human movement, they don't always send notifications, despite having notifications enabled and sensitivity set to a higher level. This problem occurs both during the day and at night. As a result, I am forced to record continuously, which in turn causes the memory cards to fill up quickly, leading to the previously mentioned issue where the cameras fail to detect the memory cards.

One of these two cameras has been in use for about a year, while the other was purchased less than a month ago, yet both exhibit the same issues. This leads me to suspect that the firmware might be the cause, especially since the memory cards function perfectly on computers or other devices. The problem only occurs when the storage is full and there are files with problematic filenames. If this is indeed a firmware issue, please address it as soon as possible. Thank you.