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How should Time Machine be setup?
Authored by: everkleer80 on Apr 14, '11 02:33:25PM
Actually it's not so much TM's cleverness as it is the cleverness of sparsebundles. Rather than being one large file like a sparseimage, a sparsebundle is actually a collection of relatively small files (one for each band of data) inside a folder that the OS displays as a file (aka a package.) When TM runs, all it sees is the sparsebundle folder and all the band files inside it; since it is only backing up files that have been modified, only the bands that have changed are backed up.

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