Same problem i can use the musi from the memory card on the music player, but i can't access the memory card as it keeps saying "unable to add default folder. root directory full"

The Sansa e-series works with microSD cards. While microSDHC cards will fit into the slot, they are electronically incompatible and will not work. You need to use microSD cards, 2GB and smaller.

check you memory card. maybe damage.. change it or use another mimory card.. transfer some music or them there then isert it in your mobile

after restarting the phone don't press any key until 2 minutes.

its possible that the memory card went bad... try to format the memory card.. see if that works..

the socket where card is installed may have internal loose element so its not detecting.check out the card in another device and also check another card in your device.this will confirm the fault.

Option 1 (Internal Memory):

• Connect the GPS to your computer with a supplied USB cable
• For Windows, go to My Computer and find the connected drive (Removable Disk), when you open this disk you should see MobileNavigator folder
• From the root of this drive, you can create 3 folders: Photos, Music, Videos and copy your media files respectively
• Safely Remove Hardware the connected unit and unplug
• Select your player/viewer (Photos, Music, Videos)
• By default the internal memory (a can shape icon) is selected
• Now enjoy your media

Option 2 (SD Card):

• Assume your computer has a SD card reader
• Insert the SD card to your computer
• From the root of this drive, you can create 3 folders: Photos, Music, Videos and copy your media files respectively
• Insert the card to the Sanyo GPS
• Select your player/viewer (Photos, Music, Videos)
• Tab the internal memory option (a can shape) to change to SD card option (sd card shape) to access files on SD card
• Now enjoy your media

Just remove your Memory Card for few minutes and again insert the Memory Card, then it's works fine. I too had the same problem in my Samsung Champ. But now it's all fine now.

ok, I have managed to use my sandisk 512mb card to put on music...even though I didnt know you had to format the disk in phone first (I dont recommend because all my music is individual clips and not in my music file), however once you see that the music is on the card via "my files" I went to the music player and hit options...then hit "add music from" then hit "memory card"...now you must put a check mark by all the music files you want to add to the music player (or choose "all" and hit ok) This will put your chosen songs off your card into the music player and you can see the song title at the top of your player screen and use the arrows to move through your songs/clips. Choose the song and hit play.

select default memory in ur phone of memory card…else chk whether the song is more than 5 mb as according  to ur phone memory,

If your device is too full, it wont have enough room to create the music database for the new songs. Move some of your music off of the device onto the memory card. Try to keep about 10MB free for each GB of music you have. You can add to this question for further assistance. Best of Luck.