[EDIT: Fixed in 6168]
In one of the last versions of 3.0.x (or earlier 3.1.x) builds, syncing to my microsd card went fine. In 3.1.6164, I was wondering why the space in my card was rapidly dwindling. Quite simply, MB copied FLACs to my microsd card and renamed to <filename>.mp3 without being converted. Using mediainfo, the huge mp3's on my card were simply FLACs with an mp3 extension. I knew, I shouldn't have sync my collection the night before I have to travel. Anyways, if this gets fixed, how do I re-sync to fix those lossless that were erroneously copied and not converted? I hope I don't have to wipe 9,000+ songs from my microsd card and resync again
EDIT: Looking back at rated tracks (>=4 stars are synced to my phone's sd card), the issue popped up with those having timestamps of 10/29/16.
EDIT 2: This appears to be fixed in 6168. Coupled with the timestamp data, I made a autoplaylist of >=4 rated tracks with timestamps greater than 10/28/16. I saved it to an m3u and ran them through mp3tag to update the their timestamps. During synchronization, I can see MB transcoding my library FLACs to mp3s on the sd card on-the-fly as expected. The sd card is regaining space as mp3's are being copied over FLACs with mp3 extensions.