Under the hood
Directory-sync file downloads can use a staging directory, falling back to direct writes across devices
What
The part of directory sync that writes incoming files can now optionally write them to a staging directory first. If that fails with a cross-device-link error (which happens when the staging directory and target are on different filesystems or drives), it retries once, writing the file directly instead.
Why
Staging writes first is generally safer, but this fallback makes sure directory sync still works correctly even when the staging and target locations are on different devices.