I have a 2TB Sandisk Exterme USB-C drive:
Though, when I bought it, it was significantly cheaper than today’s price.
For “some time now” (many months) I have been seeing this popup on my computer:

Until recently, I had assumed Apple changed something and when I “eject” and the icon disappears from the desktop it really was not ejected yet. Perhaps some background cleanup was being done that didn’t use to happen. I would then eject using Disk Utility instead, and wait for the item to become grey, indicating fully un-mounted.
However, now that I am watching for this, I will see multiple alerts like this piled up in my Notification Center in the morning. This one, for example, was after I cleared all my notifications yesterday. I have not touched the drive or intentionally ejected it. Meanwhile, the four other drives plugged up are behaving fine.
And this drive is plugged directly into my computer versus the others going into a Caldigit TS3 thunderbolt dock. I would have expected more issues from going though a dock than connecting directly.
I am posting this to get it into the search engines. Anyone else ran into this?






