@mlincett thanks very much for taking the time to look into this and comment. I looked in the KDE Settings under “Online Accounts” and found a link there for Google Drive. I don’t think it was active, because I didn’t see anything in Dolphin under the Network drives. But I deleted the Google Drive entry from the KDE Settings.
As far as thumbnails, yes, I saw some of those discussions. I probably don’t have an unusually large number of images; several hundred photos and whatever thousands of little jpg’s and png’s that are part of the KDE install. Would the suggested thumbnail generation only be when Dolphin or another file manager is active? Would it be a one-time thing, that is, once it’s done generating thumbnails for the images it would know enough not to continue ad infinitum? If the latter were the case I would be content to let it do its one-time thing.
In any case thank you again, it’s much appreciated.