Combining copyparty with Syncthing is not something I have tested extensively, but I know people are doing this, and I have yet to hear about any related issues. It's also a usecase I want to support, so if you /do/ hit any issues, please give word! I've briefly checked how Syncthing handles the symlink-based file deduplication, and it seemed to work just fine.

The only precaution I can think of is that copyparty's .hist folder should probably not be synced between devices. So if you intend to share an entire copyparty volume, or a folder which contains a copyparty volume, then you could use the `--hist` global-option or `hist` volflag to put it somewhere else.

As for high CPU usage, this would arise from copyparty deciding to reindex a file when it detects that the file has been modified. This shouldn't be a concern unless you point it at a folder which has continuously modifying files, such as a file that is currently being downloaded or otherwise slowly written to.