Android Device as disk drive

Everytime I connect my android device as a disk drive I get errors from subsonic even if I'm not using the app. It will load up the last song that was playing as if it's trying to play it. Obviously if I'm connecting as a disk drive the sd card can not be utilized for playblack. I'm assuming this is why I receive the error. The subsonic app along with the error message are immeidiately visible in the notification bar. I've been getting this error since I got this app 4-5 months ago and none of the updates have corrected the issue. Does anyone have a fix for this?