how do I view files on micro sd? I just saved the files from my flip phone to a micro sd card, and put that micro sd card in my android tablet. I went to the file manager, but I didn’t see anything for mounting the sd device, or that it was accessible. where should I look to access files from sd cards? 

using Android lollipop
I don't think there is a standard location for the sd card directory but look for a folder called external_sd. It will depend on your tablet model.
Perversely, it will not be your /sdcard directory, this folder is your embedded storage.