Music Sync to Mobile Device

Hi All,

As a new holder of a Plex Pass, I was keen to make full use of the Sync feature when out on travels overseas without reliable WiFi or Mobile Data for streaming. However, it seems that when selecting to sync my .flac lossless CD rips, I am presented only with the options of 320kbps and below, suggesting the audio will be compressed before being synced to my device. Am I missing something, or is it not currently possible to sync original quality audio files (New feature request?)

Thanks in advance for any thoughts or tips on this issue.