Don't mean to sound rude, but is there a reason you're using AVI? It's kind of antiquated and you might be able to get better battery life with something newer.
I'm kind of impartial to VLC myself.
I like MoboPlayer. It's handled any video I've thrown at it.
USB cable, 802.11n SMB, or SD card is best.
I've been using MX player mostly.
Does it work the same way? Just drag n drop?
Plug in your phone/tablet.
Browse its directory, you should see a folder called "Movies".
Drag desired movies into this folder.
Launch media player app. They will see the files.
Okay...I am having problems doing this. I have done what you posted...I do not see the directory called Movies...is there a step that I am missing?
Thanks