My device doesnt find any of my files.If I click Music and then any option(all songs, playalists...), it says: No sounds,playalists... found. I think some of important file is missing but I dont know.

Just Connect it to your Computer using the USB Provided.
Once your Done with it, Go to My Computer, Select your Music Player there, Go
to Music or Sound File Folder, Just Click on the Song You want to Delete and
Delete it....
Good Luck!!!!!

You can have a try Leawo Tunes Cleaner. Just follow below steps. If you still have issues or have a massive music library in iTunes or other music folders that requires a more powerful and less time-consuming option, the third-party software like Leawo Tunes Cleaner can help you. It can not only automatically clean up duplicate songs in iTunes, but also automatically delete duplicate songs in other music folders. If you want to automatically remove duplicates in iTunes, the automatic duplicate remover might have the answer for you.
1. After kicking off Leawo Tunes Cleaner, click the "Clean-up Duplicate" entry. The program provides 2 duplicate scanning modes: Quick Scan mode and Deep Scan mode. Select one of them to scan duplicate songs.
2. You could delete duplicates in iTunes music library by directly clicking "Scan iTunes" button or click "Add" button to load music files for duplicates removing.
3. After loading source music files, click the "Scan" button on the upper-right corner to start scanning duplicates. The program would display all duplicates clearly and suggest what to remove. You could decide which duplicates to delete by checking them and then click the "Remove" button to remove duplicate songs.


For more details, check: How to Delete Duplicate Songs

Use the USB connector to link your MP3 player to your PC.
1. Go to start button down in the lower left hand corner of computer screen.
2. Go to my computer and double click.
3. Find the device you want to delete songs from and double click.
(the name of the device should show up on that menu screen)
4. Should a folder come up after you double click do the same to that as well.
Once inside your folder you should be able to delete any music file inside of it by right clicking and clicking on the delete option. To delete multiple songs in this file hold down the Ctrl button on you keyboard and click once on each song you choose to delete. Once you have selected all the songs right click and delete those files.

Side note: When in the list screen (list of all your music) if you click in the view tab up above you can change the way your music files and instead of "icons" you shouold change the viewing style to "list" it will be faster to delete multiple files faster this way.

Happy deleting!

Try to delete all the songs you have on your device and if that doesnt work just format it..
To delete songs from your device follow the steps below
You have to make sure that the device is on MSC mode...then make sure your device is plug in to the computer..Then go to programs - accesories - windows explorer, find the SanDisk in my computer, go to media, music and delete them from there.
Either under sync panel in your windows media player it will show your music when it's connected. just click the plus signs for what song you need to get rid of, right click and click delete.
To format it..on your device..go under..menu, setting and there should be a format option option there..let me know if that doenst work for you...
Hope this helps

P.S.Please rate accordingly...
Thank You
Computerrep

try formating it do this by right clicking on the audio player folder and choose format. but make sure you back up you music first

I never use Windows Media to add music to my sansa... If you want all music to show up click on my computer and then click on the icon for your sansa. there may be a folder that says music but if not it is a hidden folder. if this is so you must go to tools, then folder options, and then the tab that says view. under this will be an option that says hidden files and folders and click show hiden fles and folders and OK. this should allow you to see the music folder. from here on you can just copy and paste all files.

I found the best way to delete your mp3; go to start..find you device in "my computor" it will be a generic drive. right click and go to "format" click and it will prompt you to delete "playlist".."audio" or "music". However it will erase everything on your mp3 and allow new downloads. if you want to save some files; Plug mp3 in usb port..you will get prompt to define which system to play files. I use realplayer. scroll down until you can select "rca (G)" click "view" your mp3 will load and display all songs..you can then select and delete any or all, right click and choose option. To load; choose burn/transfer scrool down on the leftside to rca (G) and you can choose from you music menu ( I suggest making a playlist first to indentfy what songs you prefer, you can always add more from all music menu. add any files that you like until full. depending on song generally about 50 to 65 son on the 512 model. Do not worry about too many songs.. NO harm....they just won't fit.... I hope this help anyone with this problem

change the settings of the player to MSC and connect the device to your computer. It will be detected as a removal disc drive. Open it and it should contain the folders in your player. IF you can only see a few folders. Click on Tools-Folder Option - Show hidden files and folders. Then you should see the folders that you have. Right click on the song and choose delete.

try these methods
**Drag and Drop**
Connect your MP3 player to the computer. Some MP3 players connect directly to a USB port, while others connect to a USB port by way of a specific USB connector that comes with the MP3 player. Open the folder on the computer that contains the music files you want to transfer. This is usually the "My Music" folder, available from the "Start" menu, but it can be any folder where you save your music files. Scroll down to the song you want to transfer to the MP3 player. Right-click on the title. When the options are displayed, click on "Send To." Scroll down the "Send To" options and select your MP3 player. This can be listed as your MP3 player's name or as "Removable Drive." Click on this selection. Continue this process until you have transferred all songs that you want to your MP3 player.
--**Windows Media Player**--
If you have a large playlist to transfer, you may prefer to do it from your media player, such as Windows Media Player. Once your MP3 player is connected to the computer, open Windows Media Player. Click on the "Sync Music" tab. Drag songs that you want from your Windows Media Library over to the "Sync Music" column to create a playlist. Click the "Begin Sync" tab at the bottom once you have all of the songs on your playlist. This action will sync all of the songs to your MP3 player with one click. Disconnect your device once songs have been transferred by clicking on the "Safely Remove Hardware" icon in the bottom-right side of the desktop tray.