Open My Computer and click on the Tools menu option. From the drop down list, choose Map Network Drive.
Pick a drive letter that you want to use to access the shared folder and then type in the UNC path to the folder. UNC path is just a special format for pointing to a folder on another computer. You first use two slashes “\\” and then the server name, \\testcomp and then another “\” followed by the shared folder path, \\testcomp\foldername.
Make sure there is a tick next to “Reconnect at logon” to make the connection permanent. This means when you next log on the shared file store will still be available to you.