Hello from the Hoosier Heartland, Gungor AYAR.
I'm not sure if I can help but I'll try.
First, make sure the SD card you are using is up to specifications. Here is a list from DJI.
View attachment 5493 There is no slider that I'm aware of to record to the SD card when inserted into the Spark. It just does.
If you are referring to the sliders here...
View attachment 5494
They are for recording cached (poor quality backup footage) to your device.
Your device may have optional storage to an SD card that is not there and the DJI Go4 app may be automatically switching it OFF because it can't store anything if there is no card available?
When taking pictures or videos they will be stored on the SD card in the Spark.
Remove the card from the Spark, upload your files to the PC and enjoy the quality verses the cached crap on the device.
Welcome to the Forum.