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Google Drive misplaces months' worth of customer files
(www.theregister.com)
This is a most excellent place for technology news and articles.
If you just did a format and didn't overwrite the whole disk you could use DMDE, ddrescue, photorec, or testdisk to restore the files.
Or even something nonfree like recuva.
But this is why you're supposed to do backups in 3s!
HRM. I may have to try this on an old disk that got accidentally formatted years ago that I haven't touched since.
Thanks.