How to Set Up Off-Site Backup for Your Business

If your only backup is stored in the same building as your primary data, you do not truly have a backup. A fire, flood, theft, or ransomware attack that destroys your office could simultaneously destroy both your production data and your local backup, leaving your business with nothing to recover from. Off-site backup — storing a copy of your data in a geographically separate location — is not an optional extra; it is a fundamental requirement of any serious data protection strategy.

Despite this, a concerning number of UK small and medium-sized businesses still rely solely on local backup devices — external hard drives, USB sticks, or network-attached storage sitting in the same server room as the data they are protecting. A 2024 survey by the British Chambers of Commerce found that 34 per cent of UK SMEs have no off-site backup at all, and a further 18 per cent have off-site backup that has never been tested.

This guide explains why off-site backup is essential, explores the different off-site backup options available to UK businesses, and provides a practical step-by-step approach to implementing a reliable off-site backup solution that protects your data against every foreseeable threat.

Why Local Backup Alone Is Not Enough

Local backup protects you against the most common data loss scenarios: accidental file deletion, hardware failure, and software corruption. These are important protections, and local backup should remain part of your strategy because it offers the fastest restore times. However, local backup fails completely against scenarios where your physical premises are compromised.

Consider a ransomware attack. Modern ransomware actively seeks out and encrypts backup files. If your backup device is connected to your network — as most NAS devices and USB drives are — ransomware will find it and encrypt it alongside your production data. Your local backup becomes useless at precisely the moment you need it most.

Consider a fire or flood. Your server and your backup NAS are both in the same server room. A fire destroys both. A burst pipe floods the room. An electrical fault damages all connected equipment. In any of these scenarios, your local backup is destroyed along with your production data.

Consider theft. A burglar takes your server and the external hard drive sitting next to it. Or a disgruntled former employee, who knows where the backup is stored, takes it on their way out. Your local backup is gone.

Off-Site Backup Options for UK Businesses

UK businesses have several options for off-site backup, each with different characteristics in terms of cost, speed, security, and complexity. The right choice depends on your data volume, restore time requirements, internet bandwidth, and budget.

Cloud Backup

Cloud backup is the most popular and practical off-site backup option for UK SMEs. Your data is encrypted and transmitted over the internet to a data centre operated by your backup provider. The data centre provides geographic separation from your office, physical security, redundant storage, and professional management — all for a monthly fee that scales with the volume of data stored.

When selecting a cloud backup provider, ensure they store your data in UK data centres. This is important for UK GDPR compliance, as transferring personal data outside the UK requires additional legal safeguards. Most reputable UK-focused backup providers operate from data centres in locations like Slough, London Docklands, Manchester, or Edinburgh, providing full UK data residency.

Encryption is essential for cloud backup. Your data should be encrypted before it leaves your premises (client-side encryption) using AES-256 or equivalent encryption, with encryption keys that you control. This ensures that even if the cloud provider's infrastructure were compromised, your data would remain unreadable without your encryption key.

Managed Backup Service

A managed backup service combines cloud backup technology with professional monitoring and management. Your managed service provider configures the backup, monitors it daily to ensure it completes successfully, addresses any errors, performs regular test restores, and manages the restore process if you need to recover data. This is the best option for businesses that want reliable off-site backup without the burden of managing it themselves.

The cost of a managed backup service is typically higher than self-managed cloud backup, but the value is in the peace of mind. A self-managed backup that silently fails for three months because nobody checked the logs provides zero protection. A managed backup that is monitored daily and tested monthly provides genuine, verified protection.

Step-by-Step Implementation Guide

Step 1: Audit Your Data

Before implementing any backup solution, conduct a thorough audit of the data you need to protect. Identify all data storage locations — servers, workstations, cloud services, email, databases — and categorise data by criticality. Measure the total volume of data and the daily change rate (how much new or modified data is generated each day). These figures determine your bandwidth requirements and storage costs.

Step 2: Define Your Backup Objectives

Define your Recovery Point Objective (RPO) and Recovery Time Objective (RTO) for each category of data. Your RPO determines how frequently backups must run — an RPO of four hours means backups every four hours. Your RTO determines the infrastructure required for restore — an RTO of two hours requires a fast internet connection and efficient restore processes.

Step 3: Select Your Solution

Based on your data volume, objectives, and budget, select the appropriate off-site backup solution. For most UK SMEs with less than 5 TB of data, a managed cloud backup service provides the best balance of cost, reliability, and ease of use. For larger organisations or those with very aggressive RTOs, a combination of cloud backup and local standby infrastructure may be required.

Step 4: Configure and Test

Install and configure the backup software, define your backup schedules and retention policies, and run the initial full backup. The initial backup of all your data may take several days to complete over the internet, depending on your data volume and upload bandwidth. Once the initial backup is complete, subsequent backups transmit only changed data, requiring far less time and bandwidth.

After the initial backup completes, immediately perform a test restore. Restore a selection of files, a database, and ideally a complete server image to verify that the backup is functional. Document the restore process and the time it took, and compare against your RTO to confirm that your objectives can be met.

Ongoing Management and Testing

Setting up off-site backup is not a one-time task. Backups require ongoing monitoring, testing, and management to remain effective. Monitor your backup jobs daily — or better, use a managed service that monitors them for you. Check for failed or incomplete backups, address errors promptly, and ensure that new data sources are added to the backup as your business grows.

Perform test restores at least monthly. A backup that has never been tested is not a backup — it is an assumption. Rotate through different types of data in your test restores: one month test file restores, the next test an email mailbox restore, the next test a database restore, and periodically test a full server restore. Document every test, including the time taken and any issues encountered.

Review your backup strategy annually, or whenever there is a significant change to your IT environment. New applications, increased data volumes, and changes to compliance requirements may necessitate adjustments to your backup configuration, retention policies, or recovery objectives.