I'm running on snow leopard and want to upgrade to el capitan. If I just upgrade, my data will safe after finished or need to recover again?

I'm running on snow leopard and want to upgrade to el capitan. If I just upgrade without backup (Because I don't have External HDD) the data usually will safe/normal after finished just like we update iOS iPhone via OTA or need to recover the data again everytime we updating the Mac OS?

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howapple - hello

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If everything goes to plan, your data will indeed be safe. Things on occasions do go wrong so a backup is essential if you value your data.

Ciao.

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