Integrate USB Music and Sentry Mode storage on same device.

Currently you can't use (USB A or USB C) based SSD device with Music and Sentry Mode. It is one or the other not both.

Even though you have the sentry mode folder created on the USB SDD. It will only recognize sentry mode even if you have music stored on the device as well.

Obviously it would have to have a minimum threshold read speed and write speed test to enable this feature. Just in case someone used a USB stick instead of a SSD drive.

This can already be done in fact I do it my tesla. only need to partition de device properly