External hard drive not backing up to NAS unit

  Caesarhere 11:21 02 Aug 2018

I have a Buffalo LS220 Link Station unit set up to Raid1. I have copied/loaded on to it files from an external hard drive on which I keep all my files. I want the Buffalo unit to update automatically when files are added to or modified on the external hard drive. However it is not doing this and I have to update the Buffalo manually by copying files between the two. I am not able to find out how to link the two drives despite looking through the the comprehensive instruction manual. Is anyone able to help? I am using Windows 10 operating system.

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