No Artie I did not try that but I will bear it mind in case it happens again.
What happened was, I went out for couple of hours and on return sent an email.
After closing, I again dragged the icon to the trash and low and behold, it closed.
Why, I have no idea but I was relieved.
BTW, I believe I could have shut down my computer and back on again with no ill effects to the external HD. The trouble shooting info led me to that conclusion.
Thanks for your reply.
jaybass


OS 13.6.6 iMac (Retina 5K, 27", 2017, 3.4 GHz Intel Core i5, 24 GB RAM, 2400 MHz DDR4. SuperDuper. 1 TB Lacie HD