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Always back-up your most important data

Safeguard your most important data, such as your photos and key documents, by backing them up to an external hard drive or a cloud-based storage system. 

If your device is infected by a virus, malicious software (malware) or accessed by a cyber criminal your data may be damaged, deleted or held to ransom by ransomware preventing you from accessing it. Backing up your data means you have another copy of it, which you can always access. 

Make sure that the external hard drive you are using to back-up your data is not permanently connected to the device you are backing up either physically or over a local network connection.