With 25 years of experience in this industry, the most valuable lesson learned is the oldest one: an ounce of prevention is worth a pound of cure.
I cannot stress how important it is not only to have a good and appropriate backup system, but also to test and audit that system. Data Recovery is an art form and is getting better and more accurate every year, but it can never make you whole from any loss.
The cost of a data loss is measured in the loss of productivity for you and your staff, the cost to recover the data, the down time experienced from the time of the loss to the time the data is restored, the opportunities/business lost as a result, the damage to your image/reputation when clients or vendors are not able to be helped and the stress on the organization during the recovery process.
Backups may be as simple as using a flash drive, external hard drive, cloud backup service or having a bare metal backup to restore a file server.
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