mobile

In windows, I'd use a partition; in android, are there any folders (like /boot?) that are not deleted after I flash factory images (wiping data obviously)?

I'd like to know this because I have a lot of music, and don't want to have to re-copy it to my phone every time I flash it. (unfortunately N5 does not support sd cards)

My intention was to copy the music to /boot, will it get wiped?