Thank you for commenting!
I understand fully what it does, and how it should do it. QSync Client is a direct analogy to Google Drive desktop client which does the same: monitors for file changes and syncs them when appropriate.
However it should be doing “nothing”, almost, when in steady-state: it should work event-driven and thus only do actual work upon changes. This is obviously not the case with continued CPU-use when in steady-state - this points to some busy-algorithm being present.
I bring this forward only in the hope that it will be improved as the client matures and moves out of beta.
BTW I do “worry” about any unwarranted cpu-use. It points to poor implementation and hurts battery-life with absolutely no gains.
So,hoping QNAP will improve this to reach usual high level of functionality. Have been using QNAP NAS’s for 15+ years with great joy 
(My background:30+ years as developer, It architect etc).
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