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Synchronisation and backup solve different problems. Synchronisation makes the same data available in several places; a backup preserves a recoverable version that does not automatically follow every change.
The difference becomes visible with accidental deletion, ransomware, corrupted files or account loss. An error that is synchronised perfectly is still an error.
Not automatically. Many cloud services synchronise changes and also provide version history or recycle-bin functions. That can be useful, but you need to know how long recovery remains available and whether account loss or ransomware can affect all accessible versions.
That a single event cannot modify or erase the copy at the same time. An offline drive, separate account or other storage location can create an additional failure boundary. The right combination depends on the value of the data and how quickly it changes.
Restore several files and, where relevant, a complete application or database to a separate test location. Check permissions, passwords, encryption keys and dependencies. A green “backup completed” message is not a restore test.
This connects directly to Digital and to digital self-reliance for everyday work with files and recovery.
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