Does the disc go to sleep for about 15 minutes? This doesn't happen without a USB cable connected, but with a cable connected the hard drive goes to sleep after 15 minutes, both under Windows and Linux and on the NAS. All three systems claim that the automatic HDD standby is deactivated. So it must be either the HDD itself or the enclosure. I checked the settings of the HDD itself (Seagate Exos X20) with Seagate's tool, and the HDD is configured so that it does not go into standby on its own. Now I'm wondering if the controller of the Ugreen enclosure sends the HDD to sleep. Does anyone have similar experiences?