Backup copies for companies: types and how often to perform them

Losing a company’s data is not a remote possibility. Incidents that cause information loss are more frequent than many believe, and their causes go far beyond cyberattacks: hardware failure, human error, a power outage, or a physical disaster can erase years of critical information in minutes. Backup copies for companies are the only measure that guarantees this scenario does not become a point of no return for the business.

However, it is not enough to make backup copies in just any way. The type of backup, the medium used, the frequency, and the retention policy are decisions that determine whether the company will be able to recover from an incident in hours or whether it will take days, with all that this implies in terms of loss of productivity, contractual penalties, and reputational damage.

Why backup copies are part of the business cybersecurity strategy

For years, backup copies were managed as an infrastructure task, separate from the field of cybersecurity. This separation no longer makes sense. Ransomware —the most devastating and frequent type of attack today— encrypts all files accessible from the network, including backup copies if they are connected to the same environment. A company that does not have properly isolated and verified backup copies for companies may be forced to pay a ransom or assume the total loss of its data.

Integrating the backup copy policy into the business cybersecurity strategy is now a requirement, not a recommendation. And for this reason, it is essential to know what types of backups exist and when to apply each one.

Types of backup copies for companies

Full backup copy

It is the most basic and the one that serves as a starting point for any strategy. A full backup replicates all selected data: systems, databases, user files, and configurations. Its main advantage is that restoration is simple and fast, since all the information is contained in a single set. Its drawback is that it consumes a lot of storage space and execution time, which means it is not viable to perform it too frequently in environments with large volumes of data.

In most backup copy strategies for companies, the full backup is performed weekly or fortnightly and serves as the basis on which the other types rely.

Incremental backup copy

It only replicates the data that has changed since the last backup performed, whether full or incremental. It is much faster and lighter than the full backup, which allows it to be run more frequently, even several times a day. Its disadvantage is that restoration is more complex, as it requires chaining the last full backup with all subsequent incremental backups up to the desired restore point.

This typology is especially useful for backup copies for companies that generate data continuously and need to minimize information loss in the event of an incident.

Differential backup copy

It replicates everything that has changed since the last full backup, regardless of previous differential backups. It takes up more space than the incremental backup but simplifies restoration, since only the last full backup and the last differential backup are needed. It is an intermediate option that combines relative execution speed with a more agile recovery than the incremental backup.

Mirror backup copy

It maintains an exact and updated replica of the source data. Any change in the original files is immediately reflected in the copy. It offers the most recent possible recovery point, but it has an important risk: if a file is deleted or corrupted at the source, the change also propagates to the copy. For this reason, it should not be used as the only strategy, but as a complement within a broader policy.

Offsite or cloud backup copy

Regardless of the type of backup chosen, one of the most relevant decisions for backup copies for companies is where the data is physically stored. Local copies —on proprietary servers or NAS devices— are vulnerable to the same physical risks that affect the company’s facilities: fires, floods, or theft. Copies in external locations or in the cloud guarantee that, even if the facilities become unusable, the data remains intact and accessible.

How often backup copies should be performed

The optimal frequency of backup copies for companies is not the same for all organizations. It depends on two fundamental parameters that each company must define before designing its policy:

The RPO (Recovery Point Objective) is the maximum amount of data the company can afford to lose, expressed in time. If the RPO is four hours, the company cannot afford to lose more than four hours of activity. This determines the minimum frequency of the backups.

The RTO (Recovery Time Objective) is the maximum time the company can be without access to its systems before the impact becomes critical. This parameter influences the type of backup and the restoration infrastructure required.

Recommended frequency according to the type of company

For companies with continuous activity and constantly updated data —such as e-commerce, logistics, financial services, or healthcare— the minimum recommended frequency is an incremental backup every few hours, complemented by a weekly full backup. In highly critical environments, real-time continuous data protection may be necessary.

For SMEs with regular activity but without real-time transactions, a weekly full backup combined with nightly daily incremental backups is usually sufficient to guarantee adequate protection without overloading systems.

For companies with stable documentation and little generation of new data, a weekly full backup may cover basic needs, although it is always advisable to complement it with at least one additional incremental backup midweek.

The role of verification in backup copies for companies

One of the most serious —and most frequent— mistakes is assuming that a backup copy has been carried out correctly simply because the process has finished without visible errors. Corrupt, incomplete copies or copies stored on media that have silently failed are a reality with serious consequences when the time comes to restore.

Backup copies for companies that truly protect the organization are those that are periodically verified through real restoration tests. It is not enough to check that the file exists: it is necessary to verify that the data is recoverable and that the restoration process works within the estimated time.

Best practices for a solid business backup copy policy

For backup copies for companies to reliably fulfill their function, specialized technical teams follow a series of fundamental criteria:

• Apply the 3-2-1 rule: three copies of the data, on two different media, with at least one copy outside the company’s facilities.
• Automate all processes to eliminate dependence on manual interventions that may be forgotten or fail.
• Encrypt backup copies to protect the confidentiality of the data in the event of unauthorized access to the storage medium.
• Isolate copies from the production environment so that a ransomware attack cannot reach them.
• Define and document the RPO and RTO values for each type of critical data.
• Review and update the backup policy at least once a year or whenever significant changes occur in the systems or data volume.

Frequently asked questions about backup copies for companies

How many backup copies should a company have at a minimum? The industry standard recommendation is to maintain at least three copies: the production copy, a local copy on a different medium, and an external or cloud copy. This distribution guarantees protection against most risk scenarios.

Are cloud copies sufficient or are local copies also necessary? Cloud copies offer protection against physical risks, but they depend on the availability of an internet connection for restoration. In environments where recovery speed is critical, combining cloud copies with local copies provides greater flexibility and shorter restoration time.

What happens if ransomware also encrypts the backup copies? This is one of the most common attack vectors. To prevent it, copies must be isolated from the production environment, preferably on media that are not continuously connected to the network or in cloud services with write protection and immutable versions.

How often should restoration tests be performed? At least once every quarter for critical systems. Tests must simulate a real recovery scenario and verify both the integrity of the data and the effective restoration time.

Are backup copies regulated by the GDPR? Yes. The GDPR requires organizations to adopt technical measures to guarantee the availability and integrity of the personal data they process. A documented and verified backup copy policy is one of the elements that proves compliance with this obligation.

A solid backup copy policy is the foundation of business continuity

Backup copies for companies are not insurance against an unlikely risk: they are the answer to a question every organization should have asked itself before the incident occurs. Correctly defining the types of backup, the frequency, and the verification policy is what determines whether the company can recover in hours or whether the impact lasts for days.

Integrating this policy into a broader cybersecurity strategy —which also includes training the human team, threat detection, and incident response— is the most effective way to protect the business as a whole. If you want to review how your company is managing its backup copies or strengthen your cybersecurity training strategy for companies, at Gestinet we can help you design a plan adapted to the reality of your organization.