Backing up to an external drive with Time Machine

This is a discussion on Backing up to an external drive with Time Machine within the Apple Discussions forums, part of the Apple Forums category; I have a MBP running OS X 10.7.5. I use Time Machine to back wirelessly up to an external hard drive - WD MyBook Live. ...

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  1. #1
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    Question Backing up to an external drive with Time Machine

    I have a MBP running OS X 10.7.5. I use Time Machine to back wirelessly up to an external hard drive - WD MyBook Live. All works fine for about a month, then Time Machine tells me it needs to start a completely new back up, (which also deletes the old back ups). I do use the WD drive for other purposes, principally as a shared drive for my wife's and my laptops. Any idea why I have to start the back up process from square 1 every month or so (the first back up of which is a lengthy process)

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    I don't know for certain, but my guess would be that the sparsebundle file used by Time Machine has become corrupt.
    'Deep Thought' - Mac Mini Late 2018- macOS Mojave (10.14.5)
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    'Orac' - MacBook Pro 13" Mid 2012 - macOS Mojave (10.14.5)

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    Could be, but my wife, who also backs up on Time Machine on her Mac Book Air to the same external drive, experiences the same problem...

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