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What is a partition?
A hard drive's storage space can be divided up into several areas which can be used as separate,
independent hard drives. These areas are called partitions. Every partition in Windows receives its own
drive letter.
Hard drives can only be partitioned retroactively if the respective hard drive (hardware) is reformatted,
i.e. all of the data is removed (there are also special programs which can partition unformatted drives, but
there is no guarantee that this will happen without loss of data!).
What is a backup?
Copying of files to a different file storage medium to secure these files is called backing up, or creating a
backup.
There are three different variants of data backups:

Full backup: All marked files will be compressed and saved in one file.

Incremental backup: Only files that have changed since the last backup will be compressed
and saved.

Differential backup: Only files that have changed or have been added since the last full
backup will be compressed and saved.
What is an image?
An image is a direct representation of a CD, DVD, hard drive or another storage medium. The
difference from a copy or backup is that an image contains information about the structure of the original
storage medium, and not just individual files. This enables 1:1 copies of complete storage media to be
created.
Some file extensions of images are: iso, img, nrg.
Images can also be mounted as a virtual drive. All of the data on the medium can be made accessible
without having to copy all of the data to the PC or having to insert the disc into the drive.
ISO image
is the name of an image on a CD/DVD in the ISO 9660 format. This norm indicates that the file system
was copied without any changes, so that the files can be exchanged between different operating systems
like Microsoft and Apple.
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