Thanks you for all your advice on AFT.
I found something interesting : After transfert (finaly) done, I saw that the displayed used capacity by the SP1000 was 10 Gb less than the total of the music that was stored on ly Computer !! I thought that some file have not been transfered !
but... NO, finaly I found that
on the DAP, the files take less storage space than when stored on the Computer. This I guess has something to do may be with a more efficient FAT (file alocation table) on the DAP than on the MacOS computer ?
Anyway, this is good news, I have 10 Gb more space than expected
See below, side by side, on the right the display of a directory on my computer and on the right, the same once transfered on the DAP (using AFT): Each track take 5 % less storage space !
But... The bad news is that the internal total capacity is only 227 Gb, which may be normal ( I guess 29 Gb are eated by the system), and...
my 200 Gb microSD show only 183 Gb available !! Where are the 17 Gb Missing ? There is no system files son the MicroSD !?
--> Are you also experiencing a loss of available capacity of almost 20 Gb on your microSD ? (and 29 Gb internaly ) ?