I think this was discussed a bit here:
Depending on how you’re running Duplicati (tray icon, service, portable-mode, etc.) it could be in:
- %temp%
- %tmp% (often the same as %temp%)
- %systemroot%/temp
- wherever you set the
--temp-dir
to (if you’re using that advanced parameter)
If you’re not finding the expected files in any of those places, while it’s not elegant, a global drive search for Duplicati-*
might point you in the right direction. Otherwise, a disk usage tool like WinDirStat or similar might also help you find your “very large upload volume size” sized files.