ekuest, it sounds like you have not set up your LAN in ES File Explorer yet. There are instructions around here somewhere, but first you might want to open ES File Explorer and see if you can see the LAN tab. If so, you want to scan for drives. If you need more help it is available.
Once you have your LAN drives visible it is easy to copy and paste from LAN to Local and vice versa (but if you don't immediately see how, just ask!!)
