The backup failed. Time machine could not back up on external hard drive

I can't save my disk of time machine. Went to disk utility. 2 TB of capacity. 11.27 GB available. Use the hard drive of my iMac with 1.11 TB

675.22 F. What should I do?

Is your "drive external time machine" directly attached to your iMac or an AirPort Extreme / Time Capsule? If the last two, what is the exact model of either?

Tags: Wireless

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