Reformat External Hard Drive

I recently backed up my MacBook through Time Machine because I wanted to delete all of the multiple iPhoto Libraries/Photos/Thumbails/Extras. I backed everything up beforehand and everything is where I want it to be.
I was wondering if, when I back up my MacBook again, does Time Machine erase what I have erased on my original hard drive?
--Megan

Time Machine will delete those items if they're no longer on the MacBook's internal drive and there isn't any free space on the backup drive. It is intended to be used to retrieve items which have been accidentally deleted from the original drive or earlier copies of overwritten items, not as primary storage.
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    Message was edited by: Kappy

  • Inherit Time Machine History on Reformatted External Hard Drive?

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    Hello TheRedWino, and a warm welcome to the forums!
    Hmmm, what kind of Case/Chipset does it have?
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  • Greeting,  I want to reformat my external hard drive using Mac OS Extended (Journaled, Encrypted ) but before formatting it, I want to make sure that if I loose the hard drive or the hard drive get stolen, no one will be able to retrieve or recover the in

    Greeting,
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  • HT1284 Do I need to reformat my external hard drive before I backup to it?  It shows very little free space when in fact it is empty.

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  • I just had to reformat the external hard drive that houses my iPhoto library, then restore it from a backup. Now Time Machine is telling me my backup hard drive suddenly does not have the space to complete a backup. I also noticed when I go in to Time Mac

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    Hallo  Kieth ,
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    Tirrel wrote:
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