Windows xp error messages error copying file or folder

[wsah4]

Am trying to copy pictures or word document to a 4 gig san disc. The message I get is cannot copy ....: files on this cd-rom drive are read-only. You cannot copy or move files over to this cd-rom drive.

 

[aford10]

Are you copying from hard drive to the sandisk?

Do you have admin rights?

 

[wsah4]

yes I am copying from hard drive & yes I have admin rights

 

[aford10]

Try this first.
http://www.techsupportforum.com/design-forum/graphic-design-digital-imaging-multimedia/349555-cannot-copy-usb-memory-stick.html

If that doesn't work, check out these solutions.
http://support.microsoft.com/kb/324129