Does the Dropbox app on PR2100 use client_modified timestamp in Dropbox API v2? File modification time is not preserved

My Cloud OS 3 Personal & Network Attached Storage My Cloud
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Just so you know I cross posted/reposted here: XPOST: My Cloud - Personal Cloud Storage: Does the Dropbox app on PR2100 use client_modified timestamp in Dropbox API v2? File modification time is not preserved