WD500 labeled as a "CD-ROM" by Windows XP--can't reformat it

Thank you for replying so quickly. 

It said ‘CD-ROM 1’ so I changed it to Drive E.  However, It still shows up as a CD-ROM and properties shows that the disk is entirely full.  When I open  Drive E I find the following:

1.  “Extras” folder containing

     1) folder “quick install guide”

     2) WD SES Device Driver 3)Adobe Reader Download

2.  “User Manuals” folder containing: 

     1) folder “My Book Elite” 

     2) folder “My Book Essential” 

     3) folder "My Passport Elite 

     4) folder “My Passport Essential”

  1. “WD SmartWare” folder containing: 

     1) folder “Locale” 

     2) folder “what is this resources”

     3) program dotnetfx  4) program NetFX64 

     5) CD image labeled “SmartWare_CD” 

     6) XML Document labeled 'VCD Version" 

     7) Windows Installer package labeled "WD SmartWare Setup (x64) "

     8) Windows Installer package labeled “WD SmartWare Setup (x86)”

     9) Shockwave Flash Object labeled “WelcomeAnimation”

4.  Setup Information labeled “autorun”

  1. Unlock Utility for WD SmartWare labled “Unlock”

6.  Virtual CD Manager–this image appears to be a folder held in a vice.

7.  SetUp Application for WD Sma… labled “WD SmartWare”

8.  Firefox Document labled “What is this”

I want this to look like the other WD500 that I purchased at the same time–that’s just a drive with a letter to which I manually transfer folders and documents.  When I open the other WD500, all I see are folders with documents.

Can I delete the above 8 items–that is to say the entire contents?

Thank you