I have two Mac, a MBP (1) and a Mini (2).
On both i have externals WD Drives, a My Book Essentials 3 To (USB 3.0) for the (1), using a Hub Belkin, and an Elements Desktop 3 To (USB 2.0) for the(2).
Both are brand news and on both i have the same problem, or it looks like, they anmount themself. For the (2). For the (2), it even happens while transfering files from the (1) to (2) using home WiFi.
I don’t think it’s the Hub, i have the same problem with the drive directly plugged to the (1). I don’t think it’s the USB cable, not on both computers.
Does anyone have such a problem ?