--- title: "Issues duplicating to NAS devices" slug: "issues-duplicating-to-nas-devices" updated: 2023-11-13T23:28:46Z published: 2023-11-13T23:28:46Z canonical: "docs.retrospect.com/issues-duplicating-to-nas-devices" --- > ## Documentation Index > Fetch the complete documentation index at: https://docs.retrospect.com/llms.txt > Use this file to discover all available pages before exploring further. # Issues duplicating to NAS devices Resources One solution is to use the **Backup** option in Retrospect instead of **Duplicate**: When Retrospect performs a Backup the files are kept in a special way that only Retrospect can read and that way the files stay identical to the source even on the NAS device solving the issue of recopy files that all ready in the destination. Last Update: February 13, 2012