Just got a Mac Mini (2018) after using a Windows PC for a long time. It has a Samsung T5 external SSD, connected via the USB-C / Thunderbolt port, and was erased and formatted with APFS. No Samsung drivers or software was installed. Sometimes when the Mac wakes up, I get a Notification that the disk was not ejected properly. Checking or unchecking the Energy Saver setting about putting hard disks to sleep has no effect. There does not appear to be any files system issues. Is this the norm, or does it indicate a correctable problem? Thanks.