Data deletion


Did you know?
We perform a clean data erasure on every device that arrives at our premises - regardless of whether it has already been cleaned or whether there is still data on the devices.

The data deletion or destruction procedure depends on various factors:

  • What type of hard disk is installed?
  • Is the laptop bootable?

Before the data cleaning begins, we take an inventory of all devices. This works automatically via our reprocessing script. If a laptop is no longer running at all, the device and the data carriers are recorded manually.

Hard disk types

HDD (Hard Disk Drive)

If an HDD is installed in a laptop, we will replace them. HDDs are an old design of data carrier that are usually massively slower compared to the more modern SSDs and can therefore also affect the performance of a laptop. 

The old HDDs are then stored in our safe and as soon as it is full, we empty it. Only the management, which is also responsible for data security at wLw, has access to the safe. A special press then crushes the disks on which data is stored.

Find out how this press works in this video:

Not all HDDs have to be destroyed, however. Time and again we find hard drives that can still be used. In this case, we clean them up according to our standard procedure - simply not in the laptop itself, but on our server.


SSD (Solid State Drive)

SSDs are today's standard in laptops. It is difficult to destroy these data carriers because the data is not stored on disks but in small electronic units. In order to nevertheless guarantee secure deletion, we purge these data media according to the NIST 800-88 standard, with a combination of encryption and overwriting. Here, we use the hard disk-specific erasure routines of the respective manufacturers, which guarantee clean erasure in this way.

This deletion process usually takes a few minutes. Afterwards, no more data can be read from the data carriers and a new operating system can be installed in a safe manner.

If an SSD is broken and we cannot clean it up, it will also be destroyed. Here, the individual electronic units are physically destroyed. Since each individual memory chip must be destroyed, this is not done with a press, but with a shredder. This shredder cuts each SSD into 4mm small pieces: And no more data can be elicited from this cut.


Certificate of deletion

In any case, you will receive a certificate after data cleansing has been completed, which informs you about the selected deletion procedure, the deletion date and your device. The following is a small example:


More questions about the deletion process?

Just write to us, because it is important to us that you can hand in your equipment to us with the best of knowledge 🙂

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