Default Any apps to force USB MASS Storage (Root) instead of MTP that work with HTC ONE M8?

Anyone know if there are any apps to force USB MASS Storage (Root) that work with HTC ONE M8? I know several exist for Samsung devices which don't work on the M8 (i've tried) -- reason being is my car stereo goes nuts when I plug the phone in via. USB and from what i've found out it appears that it is not MTP compatible.

I use Bluetooth in the meantime but would really like to be able to plug it in via. USB so its charging.

Anyone have any experience with this? Thanks!