recovering data from external drive

Hello,

I've got a strange problem that I can't resolve alone. I did a deep scan to find lost music. Recuva found the music and named it as "F:\?\...". I've selected the music i want to recover and all is "green dot" classification (in excellent conservation). then i start to restore it on my hard drive C:, but at the end of the restoring process, only less than 1% of these files are restored, and for the other one, it's write "the device is not ready" (le ph?riph?rique n'est pas pr?t, in french). I've tried to change of restoring folder on different hard drive and external drive without any success. Please, help me, i don't know what to do and each time i've enough place on my drive of restoration.

Thank you for any kind of answer.

Cheers

Sorry for my rusted English!