According to the Support article, it seems like you’re doin’ the right thing, as long as you get the yellow status light: 
I don’t have that particular camera model, so I don’t have any personal experience with it. I’m also trying to figure out what this means:
Are you talking about the playback tab for the microSD card when you’re looking at Events (from the app’s home screen, tap Events, then tap a recorded event), like this?
This is the known issue mentioned previously where that Playback button is inoperable, and it’s being tracked in the current Fix-It Friday topic.
There’s also an SD Card item below the live viewer when you tap into an individual camera’s screen like this:
The way you’ve phrased the problem so far, I’m not sure if you mean either of these microSD card controls or something else entirely. 