2020-04-15 10:19:53 +0200 
Assertion status system-wide:
   BackgroundTask                 0
   ApplePushServiceTask           0
   UserIsActive                   1
   PreventUserIdleDisplaySleep    0
   PreventSystemSleep             0
   ExternalMedia                  1
   PreventUserIdleSystemSleep     0
   NetworkClientActive            0
Listed by owning process:
   pid 99(powerd): [0x0000000c00088000] 00:29:55 ExternalMedia named: "com.apple.powermanagement.externalmediamounted"  
   pid 141(hidd): [0x00000024000980c5] 00:00:00 UserIsActive named: "com.apple.iohideventsystem.queue.tickle serviceID:10000041f name:AppleUserHIDEventSe product:USB Receiver eventType:3"  
	Timeout will fire in 900 secs Action=TimeoutActionRelease
Kernel Assertions: 0x4=USB
   id=500  level=255 0x4=USB mod=01.01.70, 01:00 description=com.apple.usb.externaldevice.60600000 owner=IOUSBHostDevice
   id=502  level=255 0x4=USB mod=01.01.70, 01:00 description=com.apple.usb.externaldevice.60300000 owner=Microsoft LifeCam VX-5000
   id=503  level=255 0x4=USB mod=01.01.70, 01:00 description=com.apple.usb.externaldevice.60200000 owner=IOUSBHostDevice
   id=505  level=255 0x4=USB mod=01.01.70, 01:00 description=com.apple.usb.externaldevice.00e00000 owner=USB Receiver
Idle sleep preventers: IODisplayWrangler