What is the 3-2-1 rule?
It is the most widely accepted backup rule in the IT world:
- 3 copies: The original file plus two backups.
- 2 different media: For example, your computer's drive and an external drive.
- 1 offsite location: One copy kept outside your home or office, such as in the cloud.
Backing up to an external drive
A 1 TB external drive is enough for most home users. On Windows, you can turn on "File History" to automatically back up your documents, pictures and desktop. On a Mac, Time Machine does this job. Plugging the drive in only while backing up and then disconnecting it also protects it from ransomware.
Cloud backup
Services like OneDrive, Google Drive or iCloud keep your files in a separate place on the internet. In case of fire, theft or flooding, this copy may be your only lifeline. Keep automatic photo backup turned on on your phone.
What should you back up?
- Family photos and videos
- Scans of documents such as IDs, property deeds and contracts
- Accounting, invoices and work files
- Email archives and browser bookmarks
You do not need to back up Windows itself or your programs, since these can be reinstalled.
Does your backup actually work?
The most common mistake is never testing the backup. Once a month, restore a random file from your backup to make sure it works.
Simply copying files into another folder is not a backup. If the drive fails, both copies are gone.
Let's set up your backup routine together
We help you decide which files to back up and where, and set up automatic backup for you remotely. We also offer a monthly check-up service for small offices.
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