My iPhone 4S used ios7.1.5

My 17"MacBook Pro 2.4HHz intel core i7 memory  8GB 1333 MHz DDR3 runs on Mac OS 
10.7.5

If I upgrade the operating software, will I be compelled to use iCloud? I feel 
much safer with data stored on hard-drives kept in my possession than in 
some-one else's server (euphemism "cloud").

Thank you,

Michael
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