Plug into computer gpx mw3337blk mp3 player screen lights up mtp on screen cant download music ...what i have to do?? thanks if help me

MP3 players can only play music files in mp3 file format.
Google search for free mp3 music files and download them to your computer. Then connect the USB cable that came with your player, connect it to your player and then plug it into the USB port on your computer. The computer will see the player as an external storage device, then copy the mp3 music files to your player.
You can convert your CDs for free and copy them to your MP3 player. Please click on this link and follow my instructions :-
http://www.fixya.com/support/r5798418-creating_transferring_mp3_music_files

To copy music files onto your device:

1. Connect your MP3 player to your computer using your USB cable. Switch your MP3 player to the MTP mode by pressing the power button located on the top of your player. When the USB symbol disappears your MP3 player is in the MTP mode.
2. Opening your GPX audio player folder by clicking 'Start' on your computer.
3. Click on 'Start'.
4. Double Click on the 'GPX MTP Device' icon.
5. Double Click on 'Removable Storage'. Minimize your 'Removable Storage' window.
6. Open your 'My Music' folder by again clicking on 'Start' and then click on your 'My Music' folder. Choose an album or individual songs from this folder. With both your 'My Music' and 'GPX MTP Device Removable Storage' folder open. Drag an album or individual song from your 'My Music' folder into your 'Removable Storage' folder.

Here is a link to the whole user's manual:
http://www.gpx.com/owners_manuals/ML648B-IB.pdf

Good luck and thank you for using FixYa! We would sure appreciate a 4 "thumbs-up" rating for this answer. Happy holidays!

MTP stands for Media Transfer Protocol. If you did not run your installation CD BEFORE plugging the mp3 player into the computer, Windows XP and higher will read it as an MTP Device. As long as the player does not cause you problems, there is nothing wrong with your computer calling it that. If this is a problem: unplug the mp3 player from the computer, uninstall all software for that player, restart computer, reinstall allsoftware from installation CD, restart computer, then plug mp3 player into computer. Good luck!

-Tha Mp3 Doctor

You will need to format your player. Doing this will completely erase any memory on your player. Follow the steps below:

1. Plug the player up to the computer using the USB cable.
2. Double click the My Computer icon on your desktop.
3. When that opens find your player under Removable Devices or Audio Devices. Some computers will show your player twice but will have the SD MMC card showing behind the player name. That is only for formatting the SD card.
4. Right click once on the player to open the Options menu and then click on Format
5. Click OK to any warnings that come up. There may be one or two depending on your operating system.
6. Any memory will now be erased from your player and you can disconnect from the computer.
7. Reboot your computer and plug your player back in.
8. When you see USB appear on your players screen, press and hold the M button until MTP appears on your screen.
9. Reload your music.

-Tha Mp3 Doctor

Hi there is a button marked with an "m" on the right side of the player after you plug the player in hold the button for a few seconds and the display should change to usb mode. file that are put in on usb mode can't be seen in mtp mode.

On windows XP pull up windows explorer go to my computer and look for your mp3, towards to bottom of the list. click on the + next to the name, then click audio,music and the album name for the song you want, right click on the song, then delete.I just tried it on mine and it worked. I haven't tried windows 2000 yet. Hope this works for you

on the top right of you mp3 there is a button that says M.
Try holding it then plugging it back into you computer.
O.K ill try to make this easy now, do that when its off because when it says mtp on mine i can put songs on it but idk why yours is not working so try what i said on top and good luck, because if it says usb that means you share stuff but when it says mtp that means you put on music.

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If you get the MTP on your screen and your trying to sync it with your computer just press and hold the usb/mtp button and your computer will reconize it [=

when it is utp hold the select button untill it goes to usb than press hold and it should work