Question about SanDisk Sansa m250 MP3 Player

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Please Wait, Rebuilding the Library

My Sansa 250 MP3 player just keeps displaying: Please Wait, Rebuilding the Library and USB Connected MTP. It wont play and not all computers can read what is on it. HELP!

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Re: Please Wait, Rebuilding the Library

GOOD LUCK!! i am soooo frustrated with these little **** players. my old Discman is looking pretty good at this stage. at least it was straight forward!!.

Posted on Apr 24, 2007

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When I connect my sansa clip to my friends computer it will not play the music on windows media my previouse one just played but this one keeps saying sync to computer


Cancel the sync... On Windows Media Player, click on Library - then you should be able to see and play the songs from your Sansa.
If it still fails, change the USB mode within the device to MSC (instead of MTP)....

In case of a problem or clarification or my solution was insufficient, don't hesitate to post me a reply before rejecting my answer.
If you are satisfied, rate my solution with the "thumbs" or (even better) add a testimonial.

Good luck & best regards,

Mar 27, 2011 | SanDisk Sansa Clip MP3 Player

1 Answer

How do I download music on my mp3 player? I bought the mp3 player(gpxml638b) and it did not have any soft ware. I have the wire to plug from mp3 to computer, but how do I start downloading music?


1. Turn on the MP3 Player by holding the PLAY/PAUSE button.
2. Take the USB Cord and plug the corresponding ends into the MP3 Player and a Computer.
3. When connected the LCD Display will either say “USB” or “MTP”.
4. Press the “M” (mode) button to switch between “USB” and “MTP” mode.
“MTP” mode will only work, when your player is connected to Microsoft
® Windows® XP and Windows® Media Player 10.
The MP3 Player will only work in “USB” mode when it is connected to Windows® 98SE, ME, or 2000 Professional.

1. Start Windows Media Player 9 and connect the MP3 Player to your computer.
2. Click “Copy to CD or Device”.
3. In the drop-down list, on the “Items to Copy” pane, click the play list, category, or other item that you want to copy.
4. Clear the check boxes next to any files you do not want to copy.
5. In the drop-down list, on the “Items to Copy” pane, click the device that you want to copy files to.
6. Click the ‘Copy’ button.
7. Repeat steps 2-5 for any other items that you want to copy to your unit.

1. Start Windows Media Player 10 and connect the unit to your computer. On your player’s display it should say ‘MTP’. If not, then while the unit is connected press the ‘M’ (mode) button to change from ‘USB’ to ‘MTP’ mode.
2. If you have not set up synchronization between your computer
and this device, the Device Setup Wizard starts. In the Device Setup Wizard, select Manual.
3. Click Finish.
4. Select Library option. On the right pane select Sync List.
5. From the left pane you can select the Play list or Library and you will see the content songs in the center pane.
6. Select the songs from the center pane, drag and add them to the Sync List.
7. Click the ‘Start Sync’ button in the Sync List pane.
8. Repeat steps 4-7 for any other items that you want to copy to your unit.

Good Luck

Aug 17, 2009 | GPX ML648B MP3 Player

1 Answer

Computer wont recognize Sansa Mp3

There are two connection settings in USB: MTP and MSC. For some reason MTP is the default, but it doesn't connect properly on all computers. Select MSC and plug the player in again, the computer will recognize sansa e250 but not show the driver just yet. It is installing recognition software (just basic drivers - nothing heavy) and it doesnt tell you what its doing until its complete. WAIT FOR IT. Once it is complete you will see both the sansa e250 and the removable memory slot in your "my computer" now you're good to go.

Jul 19, 2009 | SanDisk Sansa e250 MP3 Player

2 Answers

Music not synchronized

Try going to the actual file the music is in on your computer, then right click Send To sansa 250. If that doesn't work look on the options menu for USB mode and change it, that works on my 280.

Oct 05, 2008 | SanDisk Sansa c250 (2 GB) MP3 Player...

1 Answer

Rebuilding library


i advice you to reformat your Sansa m230


Jul 12, 2008 | SanDisk Sansa m230 MP3 Player

1 Answer


I would recommend that you update the firmware on your device..that usually solve the problem you are update the firmware follow the link below..
I hope that helps
Please rate accordingly
Thank You

Mar 24, 2008 | SanDisk Sansa m240 MP3 Player

3 Answers

Please wait rebuilding the library. Then the m250 shuts off.

Try doing a hard reset on a Sansa m250:

  1. Turn off the Sansa. Just pull the battery out for a second and then reinstall the battery without pushing any further buttons.
  2. Plug the Sansa into a computer, and open "My Documents" in the computer.
  3. Open the Sansa file as if it were a drive, then go to the "MUSIC Specific storage" file.
  4. Right click the "MUSIC Specific storage" file, and press "Format."
This should hard reset the Sansa m250. This solution has worked for me.

I do not know if this will work on other Sansa m200 type .mp3 players.

Dec 19, 2007 | SanDisk Sansa m250 MP3 Player

1 Answer


Hey Shaya, Try this solution: double click on my computer right click on the Sansa icon Choose Format. This should release your snsa and allow you to upload music again and play it.

Sep 03, 2007 | SanDisk Sansa m250 MP3 Player

1 Answer

Computer does not show MP3 player as connected and how to stop a song playing

If you installed the firmware update, you might have forgotten to change the device to MSC mode.. try going to settings>USB mode>MSC This should probably work.. to stop a song while its playing, click the |<< button while you have the screen with the current song. (you can pause a song on this same screen with the >|| button) If you have gone back to any of the menu screens, wait for a couple seconds and the player will automatically go back tot he song display screen so you can stop the song.

Dec 26, 2006 | SanDisk Sansa e250 MP3 Player

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