Powersaves backup files are encrypted .bin files located in C:\Documents and Settings\User Name\Powersaves3DS. You can decrypt them with...
http://projectpokemon.org/forums/showthread.php?44175-Pokemon-Gen-VI-Save-Decrypter
It turns the file into a decrypted one that PKHex can read and edit. You export it as a main file, but can only be read via Gateway firmware and SaveDataFiler. Unless you have a JP console and games, where CyberSave is the option over Powersaves. Main files can't be turned into Powersaves encrypted backup files, as far as I know. Basically, it's one way.
Tks for reply!!!!!!!!!!!