iCard is designed for the iPhone/iPad which can use it as a sdcard / micro card / usb flash disk. Furthermore , iCard dont need the usb or insert sdcard / micro card into computer. It is very convenient to upload / download files include video, photo, doc, pdf, txt, etc from computer to / from iPhone/iPad wirelessly. Here is the steps what you can follow:
1. Download "iCard" and install.
2. Open the iCard, there will be url like "http://192.168.100.101" or "http://172.20.192.105" or something like it.
3. Open your computers browser like safari, Chrome, Firefox, IE, Opera, and input the url, then enter.
Now you can do what you want to do, the file will be saved on the iPhone/iPad except you delete it. So you can download the files from iPhone/iPad to computer at different place and different times. Be sure the iPhone/iPad and the compute / laptop in the same Wi-Fi network.