Data Backup Glossary
Posted on 9 March 2026 by Beaming SupportUnderstanding how to protect your business data can start with just understanding the terms you might here. Whether you are looking to defend against ransomware or ensure rapid disaster recovery, choosing the right backup strategy is vital. This glossary breaks down the most common terms and methods used in modern data protection.
Backup Types and Methods
Full Backup: A full backup creates a complete copy of all data at a single point in time.
Best for: Environments where total data recovery is critical and the extra time and storage costs are manageable.
Incremental Backup: Captures only the data that has changed since the last backup (either a full backup or the previous incremental). To restore, you need the original full backup and every subsequent incremental entry.
Best for: Dynamic environments with frequent daily updates.
Differential Backup: Backs up all changes made since the last full backup. To restore, you only need the original full backup and the latest differential file.
Best for: Balancing restoration speed and storage efficiency when used alongside a weekly full backup.
Continuous Data Protection (CDP): Automatically saves a copy of every change made to your data, essentially providing a log of all versions to allow for restoration to any point in time.
Best for: Critical applications and databases where even a few minutes of data loss would be catastrophic for business operations.
Storage and Strategy
Cloud Backup: Saves data to a remote server accessible via the internet.
Best for: Distributed teams and businesses prioritising off-site disaster recovery.
Local Backup: Stores data on physical hardware, such as external drives or Network-Attached Storage (NAS).
Best for: Quick access and local control over data.
Hybrid Backup: Combines local and cloud backups for a tiered, resilient approach.
Best for: Medium to large businesses aiming for a robust, multi-layered recovery plan.
3-2-1 Rule: A gold-standard strategy: keep three copies of data, on two different types of media, with one stored off-site. Read more about the 3-2-1 rule here
Best for: Protecting critical data against hardware failure, theft, or natural disasters.
Advanced Security and Recovery
Air-gapped Backup: Physically isolating a backup system from any network to prevent cyber threats from reaching it.
Best for: Sensitive data requiring maximum protection from hackers.
Immutable Backup: Data copies that cannot be modified, encrypted, or deleted for a set period. Even if ransomware hits your network, these backups remain untouched.
Best for: Organisations prioritising ransomware protection and regulatory compliance.
Data Tiering: The process of categorising data into different levels of importance based on how critical it is to daily business operations.
- Tier 1 (Mission-Critical): Systems that the business cannot function without for even a few minutes, such as payment gateways or active databases.
- Tier 2 (Vital): Data required for daily tasks that is important but can tolerate a short period of downtime (e.g. a few hours).
- Tier 3 (Non-Critical/Archival): Data that is rarely accessed or not time-sensitive, such as historical records.
Selecting the right backup combination is about balancing speed, cost, and risk. At Beaming, we help businesses build resilient infrastructures that keep their data safe and accessible, no matter what happens.
