I fixed that problem by using external card reader instead of using player as card reader (my player is sansa clip+). I don't understand why external card reader fixed my problem. May be because player incorrectly writes files when you use officially unsupported large sd cards, but I didn't check that.
So try there option:
1) Use external card reader (my card reader officially supports large sd cards).
2) Reformat sd card and download your songs again using external card reader.