How to store data in Client Users machine memory using ASP.Net

Hi,

i Have multiple File upload. press Uploaded button it will store on sever temp folder. those details are in List  on our program.

when i have press the submit then only those listed files fetch form server-temp-Folder and replace in server-secified- folder.

i want to make those list class save into client location for not affted by some of other updates.

how cn i store the custome list in client memory

thnaks in advance.