Well, if you're iPad is jailbroken, Cydia (the jailbreaker's app store) gets automatically installed on your iPad.
Go to Cydia (press the icon), find iFile (it's $4.99, USD) using the Search function. Once you buy it, you'll get a button to install it. It'll install on your iPad and then the iPad will either reboot or respring. Then you can start using it - no need to transfer anything from your laptop/computer to your iPad.
Let us know how you get on.
Marilyn
P.S. In other words - iFile only works on jailbroken iPads and you can only get it from Cydia...