I’m not entirely sure what your syncthing is doing, but I have roughly the same amount of data and memory usage hovers around 50-150 megs… Is this one of those funky builds with large RAM page size or a normal github release?
Edit: No, that appears to be the WD Cloud NAS things. Curiously though there is this super duper old issue with someone else on a Synology seeing about the same:
While, as mentioned, this is how it typically looks for me:
