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Stethoscope on a hard drive to illustrate forensic recovery of deleted data

Forensic recovery of deleted data

In certain situations, the data stored on a storage device can be unexpectedly lost due to human error, system failure, accidental formatting, or physical damage. In such cases, digital forensics provides specialized data recovery techniques that can be applied to a wide range of media: hard drives (HDD/SSD), USB drives, SD cards, and other digital storage devices.

One of the keys to preventing the permanent loss of information is to identify early signs of failure, such as slow startup, frequent crashes, unexpected restarts, overheating, or unusual noises from the device. At the first sign of trouble, it is advisable to stop using the system and request a forensic assessment.

When files are logically deleted (e.g., sent to the recycle bin or formatted quickly), the data is not immediately removed from the device. Instead, the references to those files are deleted from the directory structure, marking the space as “available” but not yet overwritten. For this reason, it is crucial to stop using the device to avoid overwriting the data that may still be recoverable.

In many cases, it is possible to recover deleted data either fully or partially. However, if the device has continued to be used for an extended period, the chances of recovery are significantly reduced, as the system may have overwritten some or all of the original data.

At FORENSICTECH, we have the professional tools required to carry out forensic recovery of deleted data in a secure, controlled manner, always respecting the chain of custody. Remember: the most important step is to stop using the affected device as soon as data loss is suspected.

Do not put the judicial assessment of your digital evidence at risk Require an official university degree in Computer Engineering

Spanish Law 12/1986 of 1 April recognises the full professional powers and responsibilities of technical engineers within their respective fields of specialisation and expressly includes the preparation of expert assessments, studies and reports .
In the field of information technology, the Resolution of 31 March 2026 of the General Secretariat for Universities expressly includes, among the competences associated with official university qualifications leading to the profession of Technical Engineer in Information Technology, the knowledge required to carry out measurements, calculations, valuations, appraisals, expert assessments, studies and information technology reports .
Entrusting a digital forensic examination to a person who cannot provide evidence of an official university degree in Computer Engineering may seriously compromise the defence of the case. The opposing party may challenge the expert’s qualifications, the methodology applied and the technical reliability of the conclusions, weakening the evidential value of the expert report and placing at risk digital evidence that may prove decisive in the proceedings.
Given the risk of unqualified professional practice in this field, before commissioning a digital forensic examination, make sure that the professional holds an official university degree in Computer Engineering , has proven experience, is professionally registered and possesses specific knowledge of the subject matter under examination.
Qualifications, experience, registration with officially recognised professional bodies, rather than mere membership of private associations , the methodology applied, the proper preservation of the chain of custody and respect for fundamental rights are essential elements in providing the court with an expert report that is technically rigorous, reliable and defensible before the court .
In our Frequently Asked Questions section, we explain how to verify the official qualifications, professional registration and legal authorisation of a digital forensic expert witness.

Why hire a digital forensic expert from FORENSICTECH ?

At FORENSICTECH , we provide every client with a team of qualified digital forensic experts under the direction of Hossaín Mimón, a registered digital forensic expert witness . Our objective is to provide the proceedings with digital evidence that is technically sound, traceable and understandable to lawyers, judges and courts.
By engaging our services, you benefit from:
  • Digital forensic experts holding an official university degree in Computer Engineering, registered with officially recognised professional bodies and legally authorised to prepare and defend expert reports before the Spanish courts.
  • Experience and specialisation in digital forensics and digital evidence , with each analysis adapted to the specific circumstances and requirements of the proceedings.
  • Forensic tools and specialised software for carrying out rigorous, verifiable and technically reliable analyses.
  • Professional methodology and proper preservation of the chain of custody , essential for maintaining the integrity, traceability and reliability of digital evidence.
  • Clear, well-founded and comprehensible expert reports , with an orderly presentation of the methodology applied, the results obtained and the conclusions reached.
  • The option of professional body certification of the expert report , where appropriate or requested by the client, as verification of the expert’s identity and professional authorisation and of the correct formal presentation of the document.
  • Court testimony and technical assistance at trial , with the ability to explain and defend the conclusions of the expert report before the court.
  • Services throughout Spain , with availability to participate in legal proceedings anywhere in the country.
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