Nobileex phone app cannont create file

Hi there,
I have connected my phone to my PC and I tried to save some file from my phone to my PC and this error appeared. Also I tried to make a backup and the same error appeared. Can anyone help me please to solve this and make a safe back up ?
Thanks !

Nobileex
Cannont create file “F:Documents and SettingsUSEREscritorion5530<”. El nombre de archive, directorio o etiqueta de volume no es valido.
Acceptar
