I went back and forth with one of your colleagues on on Twitter about this and we solved it by having to "force stop" the application and changing the default to the Samsung messenger. Now on your PC, right-click on My Computer and select the ‘Manage’ option. Under the 'General' tab, you will see 'Driving Mode'. Now, select the “Disk Drive” Mode after plugging in the device. If your phone is still having issues enabling the feature, bring your device to a Samsung-certified store to have a representative troubleshoot your device; it is likely that a piece of software isn't acting properly and you'll need to get it fixed. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/6\/65\/Use-the-Driving-Mode-on-Your-Samsung-Galaxy-Phone-Step-1-Version-3.jpg\/v4-460px-Use-the-Driving-Mode-on-Your-Samsung-Galaxy-Phone-Step-1-Version-3.jpg","bigUrl":"\/images\/thumb\/6\/65\/Use-the-Driving-Mode-on-Your-Samsung-Galaxy-Phone-Step-1-Version-3.jpg\/aid6785679-v4-728px-Use-the-Driving-Mode-on-Your-Samsung-Galaxy-Phone-Step-1-Version-3.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"