Hmmm. The product category you selected is for a Standard E260. But if your player is an E250R (Rhapsody player), here's a set of procedures that might help you.
Deleting songs from your E250R can be done in 2 ways: By using Windows Media Player 10 or 11, or by browsing the player through Windows Explorer.
Before you delete files, though, it's important to know that your player comes in 2 modes: "Rhapsody" and "PlaysForSure". The reason why is that music files saved in one mode would not be seen in the other mode, and vice versa.
Therefore, if you can't find the music files in your player, switch to the other mode. Here's how to do it:
Use the "Menu" button to navigate the player as follows:
Menu > Settings > Mode >
This will give you the option of: "Rhapsody" and "PlaysForSure".
Here's how to delete your songs:
(1) By Using WIndows Media Player:
> Plug your Sansa to your computer and open your Windows Media Player.
> If your Windows Media Player is version 10, then click on the "Sync" tab and you should see your player ("E250R") on the right pane along with its folders, named "Data" and "Media" or "Music". Expand the "Media" folder and you'll see the "Music" folder containing your songs. Right-click on a song and select "Remove" to delete them.
> If your Windows Media Player is version 11, then either click on the "Sync" or "Library" tab and you'll see your player listed on the left pane. The music files will be displayed on the center window. Right-click on a song and select "Delete" to delete the songs.
(2) By browsing the player in Windows Explorer
the folders containing the music files on your player are "Hidden" and you would need to set your Windows Explorer to show "Hidden Files and Folders". Open your Explorer, select "Tools" on the top menu, select "Folder Options", select the "View" tab and enable the "Show Hidden Files and Folders" radio button.
> Plug your Sansa to your computer and open your Windows Explorer
> If your player is in "PlaysForSure" mode, then your player will be recognized as a "Portable Media Device". Double left-click on your Sansa E250R and you'll see 2 sub-folders named "Data" and "Media". Open the "Media" folder and you'll find sub-folders normally named after the Artist. Your songs are located on those Artist folders. Delete them by using the keyboard "Delete" key or right-click the file and select "Delete"
> If your player is in "Rhapsody" mode, then your player will be recognized as a "Removable Drive" with a drive letter. Double left-click on your Sansa E250R and you'll see the following sub-folders: "Albums", "Music", "Photo", "Pictures", "Playlist", etc. Your songs can be found in the "Music" sub-folder. Delete them by using the keyboard "Delete" key or right-click the file and select "Delete"
I hope this procedure helps. A bit lengthy but, hey, it worked for me (lol).