Share a folder on your laptop by
right clicking the folder in windows explore
click Advanced sharing
set a name for it, set permissions to all under the permissions button.
Say yes to sharing.
Connect your tablet to internet
Download ES File Explorer http://www.estrongs.com/en/download.html
install the APK
run it, click on Local at the top left corner
type in your laptop's IP
type in your laptop user name
type in your laptop user password
type in a name to call it.
Click on your new server
Find and click the shared folder name
You can copy files by pressing and holding over them.
Copy from the server to the SD card or the other way around as you like.