I can't upload songs

Have you verified your account? And the pic isnt inappropriate or bad right?

Try putting the memory card in a USB card reader attached to your computer, which should see it as another drive. Write-protect the card first.

Have you tried different web browsers, like firefox, chrome?

doyou have a youtube account ?
video
http://www.mahalo.com/how-to-create-a-youtube-account

Open Windows Live Movie Maker or the video editing software of your choosing.

Add a picture to your film reel by clicking the "Add Photos and Video" option.

Browse for a picture on your computer that is relevant to the song you are uploading.

For instance, if uploading one of your band's songs, it would be a good idea to use a photo of your band performing.

Click on the "Add Music" tab on the task bar.

Browse for the song that you intend to upload and import it. Select the "Fit to Music" option to ensure that your video will run for the duration of the audio file that you chose.

Choose the bitrate that you feel is needed for the file, and export the video as a .wmv (Windows Media Video) file using your program's built-in encoder.

Keep in mind that the higher the quality of a file is, the longer it will take to upload to YouTube's servers.

Open your web browser and navigate to YouTube. From the home page, click on the "Upload Video" link. In the pop-up window, browse to the video that you have just created and upload it.

The uploading process will begin automatically.

Tag your songs by entering keywords in the blank field that appears after your upload completes.

Choose words that pertain to the song, such as the name of the artist and the title of the song. T

his will make it easier for others to find your music.

Share your music with your friends and family by clicking the "Share" button underneath your video.

You will be given a URL link to your video, which you can copy and paste into emails or Facebook profiles.

hope this helps

Don't know if you have the user manual or not but I've uploaded it to here:
Manual.
It may help.

when i play it shows no data

Are you running the most current version of iTunes? If not try upgrading. After that, try seeing if there is an firmware upgrade. If there is, try upgrading that too. Then try reuploading songs. If it is still not working, it might be damaged or just not working anymore. Only use Itunes when uploading songs to ipod regardless of type.

Restore the IPod software in you Nano to factory settings using Itunes.

my sony walkman mp3 player model # NW-EO15F i cannot upload any songs, i wanna upload songs. but i don't know how to upload songs.please can you tell me.

Maybe that was the last file to transfer before the drive was full up, so the file could not be fully transferred?

A 4GB stick will, in reality provide you with a little under 4GB.