My SD Card stopped writing by Galaxy Wearable! I had to unmount and mount the SD Card, then backed up, and then there is an app that is unable to be backed up which is Galaxy Wearable, That's why it can't write
Also don't understand what you're trying to achieve here, but you shouldn't need to back up your Galaxy Wearable app - should all be snugly synced up with your Sammy Account 😀