What is the primary purpose of using a write blocker in digital investigations?

The primary purpose of using a write blocker in digital investigations is to prevent accidental modification of evidence. Write blockers are critical tools that allow investigators to access and copy data from storage devices while ensuring that the original content remains unchanged. This is essential because any alteration to the original data could compromise the integrity of the evidence and invalidate its use in court.

By using a write blocker, investigators can conduct their analyses and create forensic images without risking any changes to the data on the original device. This helps maintain a clear chain of custody and supports the legal admissibility of the evidence collected. The ability to securely and accurately preserve original data is foundational in building trust in the investigative process and ensuring that justice is served. The other options do not address the primary function of write blockers, as they focus on aspects like speed, decryption, and visibility, which are not the main goals of utilizing such tools in evidence recovery.