ok..
so i just heard all of my songs as per the meter shown in NOW PLAYING screen..
all 6500+ (95% 16bit) are directly saved in the SD card, no folders & subfolders..
started listening April 2016 with this setup for an average playback time of 3-4hrs/day..
of course not daily, 2-3x per week..
unshuffled, no skipping, just plug & play..
what I have observed is that the 901s' still playing the previously-played songs..
say, what am hearing today was already played 4days ago or a week ago or so despite unshuffled..
am pretty sure i dont have any duplicate songs..
this is very minor though, no big deal..
am truly amazed with its battery life..
i bought it Sep2015 but still getting 8-9hrs on a single full-charged cycle..
i had the old 901 and i was really disappointed with its battery..
i enjoyed each moment listening to my 901s paired with tg334..
now, new songs were added to my music library since then..
reformatted my card, loaded new songs to it and with the same format above, just plug & play..