Recovering external HD can be a simple or very complex task. What will your case be?

External USB disks are a very convenient way of backing up business or personal data. External HD data recovery is required when your disc has accidentally crashed, stopped working, or accidentally formatted.

Let’s quickly see what the chances of success in recovering external HD in the most common cases are:

Disk corrupted or with bad sectors: Usually slow in access or appears in RAR mode in the operating system. It is caused by bad sectors and has a good chance of success by using specialized bad sector hardware. Software-only solutions are not appropriate for these cases. In some cases, data recovery expert Salvagdata is recommended.

Accidental fall: This may cause the reading head to break (minor chance) and / or bad sectors. If the disks are energized when dropped, the probability of success will decrease considerably. Do not open the internal HDD as this will only make the situation worse. If there is damage to the reading head, it will need to be replaced by a similar part in a suitable environment.

Firmware corrupted: In these cases, the HD will connect normally, it will not make strange noises, but it will appear zeroed or with an incorrect capacity. Data recovery is done with the use of specially designed equipment for firmwares repair.

HD making noise: Indicates break in the reading circuit and the chance of recovery is low or medium, depending on the brand and capacity of the disc. To increase the chance of success, never open or violate the internal HD that is inside the plastic case. If you do this, the chance of recovery will be almost NIL and the price of the service will suffer a substantial increase in case of success. It is necessary to replace the clean room reading / writing circuit. It may be necessary to repair the firmware and clone the HD in special equipment.

Formatted disk: Chance depends on the procedures performed and whether data has been overwritten or not. Disks configured in Windows are usually more likely to succeed than those using Mac OS or Linux. If you decide to attempt on your own, never install the program and never save the data to be recovered on the disk itself. If the HD does not present any physical problem, the service is only done through specialized softwares, many of which are not accessible to the general public.

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