Lock on external HDD

Hi,

I have observed the following behavior : when I launch Defraggler, I cannot eject my external USB HDD. As soon as I quit Defraggler, I can eject it. I don't see why it is locked when it is not in use from Defraggler.

Thanks.

.merle1.

Can you tell me if you see an error, and if so what does it say?

Thanks

:)

MrRon