The 3-2-1 backup rule
The 3-2-1 backup rule says to keep three copies of your data, on two different kinds of storage, with one copy in a different place.
The idea is that one failure, theft or fire cannot take every copy.
Why it matters for a small business
Customer lists, bookings and files are hard to recreate. Check where your copies are today.
Source: CISA, 'Back Up Business Data'
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