Hello Cyberduck fans and devs.
I am in dire need of some help.
I recently moved a bunch of video files for archival into a cryptomator vault on ondrive for business (sharepoint).
I used cyberduck for that, because the official onedrive client is very finecky when working with cryptomator and having files stored online only. I thaught I did my due diligence and actually tested some of the files before deleting them, approximately the first 3 and another 5 out of the next 20. There are approximately 150 video files, 650GiB in total now.
I evven did the sha256 check with 7zip, files were identical. So I trusted Cyberduck and carried on.
Apparently I had bad luck with my randomized samples, because now when I went to restore a larger batch of them, approximately 20% of them fail.
The files in question are still present at full size (encrypted) on OneDrive. But when downloading them through cryptomator, they always abort at the same point (different for each file respectively), with the following error, except the chunk number which is varying from file to file:
For those who don't speak German(and who does really), a translation:
Authentication of chunk 2853 failed.
^Show details [Abort]
Chunk 2853 seems strange at this point, because it aborts at the 89MiB mark of a 7.0GiB file.
I can still download the whole 7.0 encrypted GiB though, via Cyberduck with closed vault, the web interface or the onedrive client. So there is something on the OneDrive at least, and acces does not seem to be the problem.
What the problematic files have in common are a tendency for more special character and a "space" before their mp4 ending, eg "video !_# .mp4".
Im testing them all right now if that is a rule or only an inkling of mine.
I appreciate any help. Some of the videos are unique and not recoverable but dear to my heart.