Ejecting USB hard drive on sleep produces message about disk ejected improperly
When I sleep my iMac (macOS 10.14.2) with an older connected USB drive, it always wakes up with tons of messages about the disk being improperly ejected. It's never caused a problem but it's extremely annoying when there is dozens of these messages I have to close on wake-up. I've tried the setting Don't put hard disks to sleep, but that doesn't help. I haven't tried another USB drive. Any advice is appreciated.