How to avoid dust and Fungi in my sensor?

Hey everyone,

I'm having some problems with my camera gear, I went yesterday to clean my camera on a store Sony A7IV, and i Thought it was just a little bit ... guess what ? Full of fungi on the sensor, just in time to safe the sensor ! But I was talking to the guy and he says its normal in my area have more problems like this .... speacially shooting near nature etc .

So now i need to find a way to avoid this, besides the tips he gave me . Should i buy those Storage cabinets to control humidity? Or you have better options? I normally leave everything in my camera gear bag, drone etc .. but guess is not the best option ...

What do you do or recommend?