When I try to make a back-up using time machine, the back-up gets to about ~500 MB and than halts. The following error is given:

An error occurred while copying files. The problem may be temporary. If the problem persists, use Disk Utility to repair your backup disk.

I've already repaired the disk several times, so I believe that is not the problem. The errors given by console for "backupd" are -

Copy stage failed with error:11

Backup failed with error 11: 11

Another error message also popped up several times, from the process "TMHelperAgent" -

Month 13 is out of bounds


I'm using a 2016 MacBook Pro, running MacOS High Sierra (version 10.13.2). The hard disk I'm backing up to is a Samsung 1TB SSD, partitioned into two volumes (one for data, one for the backup).

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