I am not sure to be honest. I know of the feature your referring to, its actually a feature of Android 4.1 or 4.2. AFAIK it encrypts your device, if i had to gu

I am not sure to be honest. I know of the feature your referring to, its actually a feature of Android 4.1 or 4.2. AFAIK it encrypts your device, if i had to guess this would mean it encrypts the /data partition, idk about removable storage. If i had to guess this data is only encrypted on access while the OS is booted, so yes this should keep your data save from access via recovery or other bootloader.