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OS X - Operating System General OS operation information and support

Why does Time Machine say it requires 150GB more than the size of Data...


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MDJCM

 
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Why does Time Machine say it requires 120GB more than the size of Data i'm trying to back up?

Estimated size 650GB

Available space 690GB

Time Machine "requires" 770GB


I'm a bit lost, thats a big mark-up
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chas_m

 
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Time Machine is not a clone. It does the initial backup of everything and then does incremental backups adding what's changed. Perhaps it "requires" a 20% margin for doing that.
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