Heya Blasianrach-
Does that notification say:
"Your video folder is running low on available space. Clean up videos or change recording settings to ensure successful recordings."
If so, then it's referring to the actual space on that drive- That notification will display if you don't have enough space on the device to save up to a minute of footage at your current recording settings.
Do you know if the device you're trying to write to has enough space?
Anyways, the message in that notification doesn't do a great job of explaining the situation (which is the same story as the other storage warnings), and we're looking to fix that in a later update :D
In the case that your storage device has enough space, please reach out on our Discord's Support Channel and we'll see what's going wrong with that notification :D