it can lock a whole folder.the app starts in last folder that you was and get the password only at the begin. If you say `no` to access permission only once a time,it will be failed to access to your files for ever.you must install it again. NOTICE: In some nokia phones you must set permissions :"Read user data"&"Write user data" to "Always" or "Always ask" first.you will find it in information section.Otherwise it gives an error:"Access denied".