All songs are duplicated in the song list

It's not a hard work that you can have a try powerful program Leawo Tunes Cleaner. Leawo Tunes Cleaner is a professional duplicate music remover.
Step 1. Run Tunes Cleaner and Scan Duplicate Songs
After kicking off Leawo Tunes Cleaner for Windows, click the "Clean-up Duplicates" entry. The program provides 2 duplicates scanning modes: Quick Scan mode and Deep Scan mode. Select one of them to scan duplicate songs.

Step 2. Add Music Files for Duplicates Removing
You could delete duplicate songs in iTunes music library by directly clicking "Scan iTunes" button or click "Add"button to load music files for duplicates removing. Or you could directly drag music files from your local folder to the software for duplicates removing.

Step 3. Start Deleting Duplicates
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

The device only likes mp3's. Most other files don't show up.

It's not a hard work that you can have a try powerful program Leawo Tunes Cleaner. Leawo Tunes Cleaner is a professional duplicate music remover.
Step 1. Run Tunes Cleaner and Scan Duplicate Songs
After kicking off Leawo Tunes Cleaner for Windows, click the "Clean-up Duplicates" entry. The program provides 2 duplicates scanning modes: Quick Scan mode and Deep Scan mode. Select one of them to scan duplicate songs.

Step 2. Add Music Files for Duplicates Removing
You could delete duplicate songs in iTunes music library by directly clicking "Scan iTunes" button or click "Add"button to load music files for duplicates removing. Or you could directly drag music files from your local folder to the software for duplicates removing.

Step 3. Start Deleting Duplicates
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

Do not syc with wmp. Drag and drop everything from windows explorer to the media folder on the sansa.........Format everything first ....Start over

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

It's not a hard work that you can have a try powerful program Leawo Tunes Cleaner. Leawo Tunes Cleaner is the Windows based professional iPhone cleanup software that could act as iPhone duplicate remover, iPad duplicate remover, iPod duplicate remover and iTunes duplicate remover to help you easily find and remove duplicate songs from iPhone, iPad, iPod and iTunes in clicks. And it help you fix your iTunes music library and other music folders by adding song tags and removing duplicate songs.If you're interested in it, please free download it and have a try
1. Download, install and open Leawo Tunes Cleaner. Choose the "Clean-up Duplicates" option on the main interface.

2. Select a duplicate scanning mode to detect duplicate songs in your iTunes from Quick Scan and Deep Scan. Quick Scan mode is based on song tags including name, artist, album, file size and time, while the Deep Scan mode adopts Accoustic Fingerprint tech for deeper scanning. Choose desired one.

3. Click "Scan iTunes" button to start scaning duplicate copies in your iTunes music library.

4. Via scanning, all duplicate songs would be displayed. You could play back all reference duplicates and determine which file to keep and which file(s) to delete. After selecting which files to remove, click "Remove" button. Tunes Cleaner would immediately delete all duplicate songs.
After you have removed all duplicate songs from your iTunes, sync your iTunes library to iPhone via USB.

For more details, check: Three Helpful Ways to Delete Duplicate Songs on iPhone

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

Resync with Windows Media Player

The device has 2 modes of operation MSC and MTP.

If you put music or playlists on in either mode and then changed modes to add more music, you will inevitably have duplicated your music.

Best solution is to format the device to remove everything, then pick one mode ant use that one only.





Best of Luck.

Does this happen every time you plug it into the computer? If so you might have your player set to automaticly sinc. this meens that every time you plug it in all the music on your computer will go automaticly on your player. In the settings you can turn it off. Hope this helps!