Welcome to the Forum, @katiekat2! 
Are you talking about recording to microSD or to the cloud? Have you happened to hear any dings from the Window Cams or seen any error messages in the app that indicate a problem with recognizing or recording to the microSD card or its absence? If multiple Cams are refusing to record to microSD, then I wonder if there’s a slot issue with certain cards. Wyze Window Cam makes chime sounds if microSD card installed and the topic that preceded it (linked in its first post) come to mind.
I’m just speculating, but these kinds of reports about this specific Cam model make me wonder…. 
Sharing more detail about your experience might be helpful, too, like information about the Settings screens @spamoni described above. Screenshots can be particularly useful.