All of my songs got deleted & it wont let me put them back on.

Try this solution

BE SURE NOT TO DELETE YOUR FIRWARE, ONLY THE SONGS,FILES,ETC.

Deleting Files,Pictures,Videos,Audio
Books, Apps,etc. from MP3 Player/Ipod
------------------------------------------------------------------------
Hook up your mp3 player to your computer
Go to your desktop and double left click on "My Computer"
When it opens you will see listing that says "Devices with Removal Storage" your mp3 player should be listed there.
Right click on your mp3 player, and a window will open, right click on "Open" and now your files/songs should be visible.
Hold the left click down and drag it across all the files/songs that you do not want this will highlight the files/songs you do not want, release,right click and then click on "Delete"
Now you mp3 player should be clear of the files/songs you do not want.
BE CAREFUL and do not delete files needed to operate your MP3 player.
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Try to delete your music this way:

Deleting Files,Pictures,Videos,Audio Books, etc. from MP3 Player
-----------------------------------------------------------------------
Hook up your mp3 player to your computer
Go to your desktop and double left click on "My Computer"
When it opens you will see listing that says "Devices with Removal
Storage" your mp3 player should be listed there.
Right click on your mp3 player, and a window will open, right click on
"Open" and now your files/songs should be visible.
Hold the left click down and drag it across all the files/songs that
you do not want this will highlight the files/songs you do not want,
release, right click and then click on "Delete"
Now your mp3 player should be clear of the files/songs you do not want.
Be careful and do not delete files needed to operate your MP3 player.
Please rate me

SAVE YOUR CURRENT SONGS TO YOUR COMPUTER.THEN FORMAT YOUR MEMORY CARD.THEN COPY THE SONGS WHICH YOU WANT BACK TO THE PLAYER.DONT PUT THE CORRUPTED FILE BACK THIS TIME.HOPE THIS HELPS

are you sure you deleted all the songs?I suggest you connect to your pc again ,open the folder where your music is and just try deleting one song.now disconnect and see if the song is still there , actually on the player.It's possible you disconnected before the pc had time to delete everything or that you deleted the files from your pc not the player.Did you get the usual message asking you if you're sure you wanted to delete and did it then show you a progress bar?

There are 2 ways to format an mp3 player - if you were formatting the mp3 player from "My Computer," then try reformatting from Windows Media Player instead - I have a "tips and tricks" entry on How to Format an Mp3 Player for details

If that doesn't work, then double-click on My Computer, double-click on the Sansa player, and go to the various folders that it lists - music, voice, etc. Delete the songs ONLY - do not delete the dat, bat, ini, inf, or other system files

once the mp3 player is connected try performing a format on the mp3 player via the My computer .then try and reload.

Instead of deleting the songs you may need to format.

If you haven't tryed this follow these simple steps.

To format your device first click on "Start" then click on "My Computer" now look for your mp3 player, if it hasn't been change the names usually called "Removable Disk", once you've found that right-click on it then click on "Format".

Now you've formatted put songs on then try your mp3 player to see if the problems be fixed.

Good luck. Hope my solution was helpful.

Are you trying to delete the sony via the motorola music manager software and it does not delete???

hmm... try hooking it up to the pc, go to my computer find the mp3 click explore go to music and select it all and delete it then try again it might help

Resync in Windows Media Player