I had an HTC desire phone, before upgrading to a Galaxy S4 Mini.
I have run into an annoying problem. On my phone (not on the SD Card), I have private data, including an RSA key, which I use to SSH into my different computers and servers. On the Desire S, I had the phone on default "Charge only" so people who nicked my phone didn't just get access to what was on it.
How do I do something similar with the Galaxy S4? I need some way to disable the mount-by-default so people who steal my phone can't just plug-in a USB cable and steal all my data. The phone should still be able to mount as a storage device, but ONLY when it is specifically activated.
In screen-locked mode, it still auto-mounts when plugged in - not exactly a good way to protect the data on the device.