Can't backup to external drive using time machine

Discussion in 'iMac' started by starkraving, Jan 1, 2013.

  1. starkraving macrumors newbie

    Jan 1, 2013
    Hi, hope someone can help:

    I have an early 2008 iMac with a 500GB hard drive (currently 433GB used)

    I have a Verbatim 500GB external drive which I have just erased (format: MAC OS Extended (Journaled), (says 499.32GB is free)

    I went into settings, Time Machine, and selected the external drive to use for backups, however Time Machine reports the following error, and I don't understand why 516.38GB is required, when my hard drive is only 500GB.

    "Time Machine could not complete the backup to external hard drive

    This backup is too large for the backup disk. The backup requires 516.38 GB but only 499.32 GB are available.

    Time Machine needs work space on the backup disk, in addition to the space required to store backups. Open Time Machine preferences to select a larger backup disk or make the backup smaller by excluding files."
  2. GGJstudios macrumors Westmere


    May 16, 2008
    This part of the message you quoted gives you your answer.
  3. starkraving thread starter macrumors newbie

    Jan 1, 2013
  4. starkraving thread starter macrumors newbie

    Jan 1, 2013
    You're right! I deselected 90GB of videos from the backup and it worked :)

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