Im fairly new to android ive have 4 other cheap ones this is my first higher end one and ive had this problem with all l of them. Ive tried using widows media player and just dropoing them on the sd card with the phone plugged in. When I try it only puts about half of them on I have about 3900 and sonething songs and it will only put about 2000 of them on. Ive tried to get them on three times and it seems randome which ones make it on as its slightly different every tine it leaves off artists and when it outs them on if there is multiple albums for the artist it may only put one of them on maybe 2. Would greatly appreciate some advice thanks.