2005 Volvo S40 water in floor

Remove the passenger side A pillar and look at the sunroof drain hose. May have disconnected because it shrunk? Or the drains are plugged up. If this is the case replace the hose and clear out the grommet of debri. Remove the seats and pull carpets out and let them dry out in the sun and scoop out any water left or you will get mildew. If the drains look ok then you may have a plugged up A/C drain from lack of cabin air filter changes. Keep me posted and let me know what you find.