Read and Write Images to folder.

Hi,

In my web application, i allow user to view and upload the images to their respective record. So as to allow this functionality i wish to store the images to a folder (on a different machine which is in network).
so, for doing this i have noted the path of the folder where i have to store,in web.config (Ex:- http://{machine name}\UploadImages )
Till now i can upload the images but i cannot view them.

So any one can suggest me the necessary permission that i should apply for this UploadImages folder so that i can read as well as add images to this folder (keeping in view of user who will be access from machine which are not in lan/wan)

Thanks in advance