How to transfer excel file using wifi shield.

Hi all! i need to urgently do a project. i need to transfer an excel file from pc-1 to (arduino Uno with wifi shield) and then transfer the excel file to pc-2. Making use of wifi shield. Can anybody help me out?

Thank you so much!!!!!! need help. Thanks guys really appreciate.

i have already gotten the network connection. Just want to know how to transfer data.
Please kindly assist thank you!