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Hard drives: HDD and SSD - where is the difference?

  • Oct 06, 2025
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Small, fast, expensive: The Alternative to traditional HDD, the SSD is. Though both types look similar, they have differences. What they are, and whether you should prefer to resort to a Solid State Disc (SSD) or a Hard Drive Disc (HDD), you will learn in this article.

HDD or SSD: differences in the functioning

The two hard drive types HDD and SSD have a completely different function:
  • The classic HDD consists of one or mostly a plurality of magnetic disks and a read head. The magnetic disks rotate in operation. The reader head (mounted on a Schwungarm) passes over the discs and reads out the stored data.
  • An SSD, however, consists of many Flash memory in USB Sticks installed. That is to say: In an SSD there are no mechanical parts are installed.
  • For those particularly interested: In separate articles we will explain the functioning of the SSD and HDD in Detail.
How does a HDD?

HDD vs. SSD: the benefits of the SSD

For several years, the SSD seems to be, slowly but surely, the classic HDD of checkmating. This is mainly due to the many advantages:
  • The SSD has no mechanical parts, which makes them much more robust than the HDD. Drops coped in the rule, easily, while you have a HDD with defects and loss of data.
  • Due to the lack of mechanical parts, SSDs are also almost noiseless. A HDD is buzzing in the operation. This is especially true in the case of laptops and PCs with slim case noticeable.
  • The most important advantage of the SSD is considerably faster than the classic hard disk. Thus, PCs and laptops with a SSD start up noticeably faster and up to twice faster than traditional hard drives. Files and programs are even open up to four times faster.
  • The SSD is finally lighter than the HDD. This means it offers, especially for mobile devices. In addition, it is usually more efficient, consuming considerably less power. Also it makes for mobile devices, because the battery life is extended.
Flash memory: SSD without Mechanics

HDD vs. SSD: the benefits of the HDD

In addition to the many advantages there are also some dangers lurking in SSDs, but. What are these and where is the HDD still has the nose in front, we have summarized here for you:
  • A HDD is currently (still) much cheaper than the SSD. However, you can also use the new hard disk--type some save, such as our price-to-performance Ranking shows.
  • Furthermore, HDDs offer significantly more storage space. Here, up to 8 TB are possible, while in the case of current SSDs, at the latest after 2 TByte is the end.
  • In the case of loss of data in HDDs, usually also hope The data with special Tools to read. In the case of an SSD that is only rarely possible.
  • Therefore, our recommendation: The SSHD combines the advantages of a HDD with fast SSD.
In the next article, we will show you the most popular SSD hard drives in the comparison.

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