The CD-ROM, Floppy drive, and other removable devices utilize the Supermount utility. Supermount manages removable media such as floppy disks, CD-ROMs and Zips similar to the way other operating systems do -- it allows you to change disks without using the traditional Unix commands "mount" and "unmount". Supermount detects media changes automatically.

And, as in other graphical environments, KDE provides a Trash bin where you can place files to be deleted. Right-click on the Trash bin and select "Empty Trash Bin" to permanently remove any enclosed files or folders.