Since my last posting, I tried Minus and was mystified by its antiquated interface and how it fails as a reliable online source for file retrieval. For instance, everything is stored in a 'flat file', meaning there seems to be no hierarchy of folders/subfolders/files, as Windows provides.
Furthermore, several identical copies of a file can be stored without any feedback from Minus, and deletion of any one of those copies seems to delete all the copies.
An attempt to drag and drop a Folder was futile, meaning it's one file at a time with Minus. Perhaps that's why it bears such a diminutive and unpromising name!