translate English to German: If you want to be able to restore your data - that is emails, documents, photos, music, or anything created by you using a program installed on the PC - but not the programs themselves, you should just copy the files to a CD, DVD, or even a usb drive.
Wollen Sie lediglich Ihre Daten (Emails, Dokumente, Bilder, Musik, etc.) im Notfall wieder zur Verfügung haben, reicht es aus, Kopien der Daten auf CD-ROMs bzw. DVDs abzulegen.