External hard drive use to back up Mac book pro 2012

I want to upgrade my OS from El Capitan to Catalina, instructions say to back up everything before doing so. I ordered an external hard drive (Samsung 250 GB, 860 EVO) and there seems to be no instructions how to do this successfully . Some one help me please.

MacBook Pro 13″, OS X 10.11

Posted on Aug 27, 2020 2:47 PM

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1 reply

Aug 27, 2020 3:32 PM in response to BW160

How to back up your Mac - Official Apple Support

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External hard drive use to back up Mac book pro 2012

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