I can not paste data on my sansa anymore.what's

this may or may not work but if your music etc. files are on your pc, then delelte them from the player and once you do so, reload them, this has worked for me in the past

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You'll probably need to buy them from an online store. The Sansa Express is a discontinued player, so SanDisk doesn't make accessories for it anymore, but if you go to Google and do a search for "Sansa Express" and earbuds, you'll see stores that still carry them.

I recommend, though, that you just go to your local electronics store and buy a pair of earbuds. Not only will it probably be cheaper because you don't have to pay for shipping, but you can return them if they don't work out for you.

Does this answer your question?

if you do not have your instructions anymore go on the wesite and they should have instruction you can read ordownload

My best bet is the cable gone wrong. If you can find a similar cable to purchase from a computer shop or a friend you can try it.

I'm always hesitant to give this answer, because if it's done wrong, you can do more damage to your player, but the answer is: you need to format your player. I would format the player from inside the player's settings menu - but if it's stuck on Refresh database, you may not be able to do this. Follow these steps in order:
These are the most common methods for recovering Sandisk's Sansa Mp3 Players. I have been almost universally successful in recovering Sansa players using one or a combination of these methods. These methods do not work if you are having synchronization or music format issues - they are for recovering a player that will not power up, freezes, flashes, is not recognized by the computer, and a host of other issues.

Reset the Sansa Player first. On most models, restart is done by holding the power button in for 15 seconds or longer. Check your specific manual to be sure. The manuals are available from the Sansa website if they have been misplaced.
Download the Sansa Recovery Tool from the Sansa website.
Format - Erases Everything: Connect your Sansa player to the computer and open Windows Media Player. Click on the Sync tab. Pull down the drop down menu underneath the Sync tab by moving your cursor over the Sync tab and left clicking on the little black arrow underneath the Sync tab. Highlight "Sansa 1GB" (wording may vary slightly), and then select "Format." - this should erase everything.
Firmware Upgrade- Erases Everything: Get the latest firmware upgrade from Sansa - it updates the firmware and erases every song in the player all at once. Note: this method doesn't work if already have the latest firmware. Go to this website and click "Firmware Updater" to find out: http://www.sandisk.com/DriverDownload/driverList.asp
If these fail, then:
Try this: disconnect the player from the computer, turn it off, hold in the volume + button, and reconnect the player to the computer while holding the volume + button in. Keep holding the volume + button for an additional 5-50 seconds. Windows should eventually go into recovery mode and revive the player- it will pop up a window that says Found New Hardware Wizard.
If you get the problem where MTP Device keeps popping up continuously, uninstall the “MTP Device” by going to Start à Control Panel àSystem à Hardware à Device Manager (you computer may vary slightly, depending on Windows Version).
You may have to restart your computer after each of these methods to get them to work properly. Disconnect your Sansa player BEFORE shutting down your computer.
-Tha Mp3 Doctor

copy the music's that you want then paste in the window with the files.(the music that you want to copy to the mp3 must be at mp3 format , if the music is not on that format use this converter http://superdownloads.uol.com.br/download/100/free-wma-to-mp3-converter/ )
please rated my solution...

Format - Erases Everything: Connect your Sansa player to the computer and open Windows Media Player. Click on the Sync tab. Pull down the drop down menu underneath the Sync tab by moving your cursor over the Sync tab and left clicking on the little black arrow underneath the Sync tab. Highlight "Sansa 1GB" (wording may vary slightly), and then select "Format." - this should erase everything.

try formatting the memory card before using it. also, ensure that it is inserted completly into the player.

I treat my Sansa like a disk drive and simply transfer the files from my hard drive to the Sansa via Explorer.  The tracks purchased from Napster can be downloaded to your hard drive.  Then I exit Napster and use Windows Explorer to simply transfer the data.  Works great for me for the past month!