Some people like to have their Operating system and programmes on one partition, say about 50Gig, and their data ("My Documents" etc)on a second, larger , partition. Depending on your needs you may find that defragmenting is easier, and incremental back ups are easier. It really is up to you - some like to keep music, say, on a separate partition. I do that mentioned in the first sentence.
Thanks Graham and John. I do have a Recovery file amongst my stuff. It seems to work OK if I have needed it. I defrag and back up regularly to a separate hard drive on USB so perhaps I shall crack on in blissful ignorance without any partitions on my hard drive.
All hard disks have a partition, even if only one. You presumably have one partition, which occupies the whole of your drive. When the drive was first set up, that's when the partition was created, before formatting for the first time.
Why have partitions? - for convenience, simpler backups, quicker recoveries, and to fit more than one OS on a system.
It's by no means essential to have more than one - I ran that way for many years.
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