Regarding my other post last night about data loss: Mystery solved. It was caused by the problem I'm talking about in this post. When I used the Team-brand flash drive (with the Windows 10 emergency re-installation files on it), the computer and cursor became very jerky, with delayed visuals, and I had next to no control over them. When I right-clicked on the flash drive in My PC, and chose "eject", it actually clicked on the drive next to it (which happened to be my sole Seagate drive), and chose "format". Without popping up a format window, the computer automatically formatted the drive in the background.
Removing the flash drive and restarting solved the jerkiness and delayed visuals.
So this post is about the effect that the flash drive had on my computer.
I have plenty of backups. Everything is backed up onto three WD drives, except movies, which are backed up onto two.
Like you, I don't trust Windows backup. I prefer to have control over what gets backed up and what doesn't. I wasn't 100% sure what was on the drive that was erased last night, so that's why Kees_B's pointing me to Recuva was helpful.
My questions in this post are;
-Could the problems described here be caused by a faulty USB reader?
-Could they be caused by the flash drive being faulty?
-Could they have been caused by the computer trying to read the Windows emergency re-installation files on the flash drive and getting "confused"?
And not not about this issue, but related;
-If I copy those Windows 10 emergency Re-installation files onto a different flash drive, will they work as well as the files put on the Team-brand flash drive that they're currently on (that seemed to have triggered the problems I'm asking about)?
Any answers to the questions in this post are much appreciated.