Q: macpro - imac network

Good morning.

I have a MacPro and iMac 10.11.5 10.11.5 both the net.

If I access the MacPro from imac or vice versa, the disks are detached alone and I have to riconetterli.

The biggest problem comes when I'm doing the copy and paste, the disc you inside or connected USB 3 is disconette making me lose a lot of time.