Songs can't be deleted or added.

When you connect the MP3 player to your computer with the supplied USB cable then computer detects the player as an external storage device or a Removable disk, you can then view the folder on your MP3 player. Open the music folder and create a new folder on the player exactly the same way you create a folder on your computer's hard drive. To organise your music, make a folder name with the name of the music album and place the album's MP3 files in this folder, then copy the mp3 files from the computer into this folder.
You will then be able to select the music you want to play by the music album folder. To delete a file from your MP3 player, connect the supplied USB cable to your player and then plug it into the USB port of your computer.
The computer will detect your player then click on this device to view the files, you can then click on the music file to highlight the file and then press the Del key to delete the file off your MP3 player.

There are a total of eight folders in the recorder that are in a tree format. Under the “Root” folder
are “Folder A” through “Folder E”, “Audible” and “Music” folders, and recorded or transferred
Language and music data from a computer can be saved as “files”. “Folder A” through “Folder E”
are voice-recording folders, so choose one of these five folders when recording on this recorder.
Up to 200 files can be saved in each folder, and up to two layers can be created within the “Music” folders.

when you add music to your itunes library, it copies them to the itunes music folder for itunes to manage it or itunes has every song twice in its library, to check whether itunes has not copied your music twice, view your music in LIST VIEW in itunes and if you see some songs has been copied twice delete on of them.
You can also delete the songs on your music folder to save disk space or you can leave them if you use another music player other than itunes.
But I think you should delete the files in your music folder.

just go to my computer open up your device, it will probably be removable disk, then if the music files are not there look for a music folder, or do a search for music files and identify which folder the music goes in, if its not the root folder

thanks, dont forget to vote

All music placed on the PSP's memory stick must be placed in the folder labeled "MUSIC". Within this folder, you may place .mp3 or .wma files, or create another folder within the MUSIC folder (to separate by artist or album, for example).

Note that the music must be in either the folder MUSIC or in a folder inside MUSIC. In other words, you can't have the music in a folder that's in a folder that's in MUSIC.

I came across the same problem with my Muvo V100. It appears that the unit has a folder access limit of some kind (seems to be 24 folders not sure what detrmines the ones it chooses). I synch with Windows media player and it creates a folder called Music in the root. Within that folder it places sub folders named for the band that the music is from. Within those folders it creates yet further sub folders with the name of the CD the music came from and then finally within those it places the MP3 or WMA files. It appears there may be too many sub folders for the Muvo to be able read all the music. I took all of the MP3 and WMA files and pulled them out to the main Music folder. I then deleted all of the sub folders named for the bands and the albums. When I start the Muvo now it allows access to all of the songs. There may be a way within Windows media player to configure the synch so it doesn't create all of these sub folders. I've not checked. If it is then it would eliminate the manual work of pulling the music files out to the main Music sub folder.

Unlocker is a small freeware program can delete any file/folder that is being used by another person/program. it can perminantly delete the netmeeting folder and also the folders xerox, microsoft frontpage, msn gaming zone, etc.

You can only transfer music from an ipod to a computer if they were purchased through itunes.

If that's the case, right click on your ipod's name under devices. Then click Transfer music.

Ezy! Open Start menu -"My Computer" and you'll see the YP-K3 player sitting there as a removable device. Now click it and then click Media folder, then Music folder. In there U can easily delete your music and/or add music by copying/pasting INTO that folder.

Hope it helps...
Andy

I don't know if you've inadvertently deleted the music folder, but that's what I did, when I deleted all the folders by mistake, thank heavens for in-store warrenty, they replaced it with another one. What I noticed on my replacement is synchronizing with media player doesn't work, it creates ghost folders and thinks music is there when it isn't, I don't understand it. Solution: open two windows for my music and sansa e280 music, then just drag and drop the folders; what I noticed is that in my music the folders are named by artist, and I prefer to see them by album, but when I view them in the player, I see the albums with the tracks in the right order.