Duplicate files · Scanning and Auto-scan
How do I stop a duplicate scan that's running?
Short answer: Select the source and click Stop (it replaces Scan now while scanning). Only that source stops; other scans continue. Switch Auto-scan off for that source too if you don't want it to start again in the background.
Select the source that's scanning and click Stop — the button that reads Scan now when idle. It stops promptly and only affects that source; scans of other accounts carry on.
If you stop a scan, the earlier results for that source aren't lost. To stop it from starting again in the background, also switch Auto-scan off for that source.