Drive health, disable spindown on external drives, esp WD

spin wdi have a new 4TB WD blue and issues with it going into sleep mode (spindown). it is confured as drive E: and a pure DATA disk. i run windows 10 64 bit. i also tried hddscanAfter about 20 mins the unit did go into standby mode (the front LED changed from a static blue to a slow, pulsating blue and the drive spinning noise was absent). Then, when I