@Putlocker
yes, a search function that enables us to search our own files. This is present in every major filehost, i'm kinda surprised you guys haven't implemented this yet.
About the copy function, it acts as a backup option for uploaders e.g I upload some files, call them A, by using the copy function i will make a backup( exact copy) of fileset A so that in future if my original links are deleted due to DMCA i can use these copied/backup files. But this isn't a very important feature, you should first implement a search feature in the file manager.
You can refer to filesonic and fileserve for this feature, check their file manager.