Has anyone done any studies on external usb hdds as to their abilities to survive a fall off a desk or being bumped. I recently knocked one off a desk. Seagate 4tb usb backup plus. I got read errors on chkdsk and then not enough space to fix mbr when I ran chkdsk /r. A reply from a forum member said drive was probably toast. I then ran seatools for windows in fix all long mode 10 hours later done and drive passed. I then ran chkdsk r again and no errors. Made me seriously doubt chkdsk. Drive so far has been working fine. I no longer trust Microsoft utilities let alone the company.....