Adam wrote: sunny, Please check this article:Writing to a UNC path with the uploading tools If you can't get this work, please check your web.config file and make sure you use impersonation in your web config. Step 1: Create a domain account which has the write permission to your UNC share Username: yourdomain/admin password="admin”I did exactly like you saidin the web.confige <identityimpersonate="true"userName="***\***"password="***"/>seems to me, we need use "\" not in the username use "/"need want to make sure, are you guys test this before? it work for anyone or just not me? someelse can help? To access resources on a UNC, your application must run under a domain enabled primary secuirty token, the easiest way to do this is to use impersonation in your web config: <identityimpersonate="true"userName="yourdomain/admin"password="admin”/>