How can I get an overview of the disk usage on a Synology hard drives like this: Disk Usage Analyzer

  • Whoops. Should have looked at the source in your post. My company must have recently blocked this image host. I'll delete this idiotic comments in a few minutes. – Aaron Copley Jan 21 '15 at 16:23

Synology has an App on it's DSM store called Storage Analyzer, which provides a very friendly user interface to view usage by folder, user, file types, duplicates, etc... It also keeps a history by analyzing periodically...

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  • The Storage Analyzer did not exist when the question was created but solves it now in a perfect way. – kimliv Jul 6 '20 at 7:58

NCDU is the closest I can find. Works really well though. Simple to use as you only have to copy the file to the diskstation, then terminal in and run. Some more instructions:


  • Can be installed via "/opt/bin/ipkg install ncdu" - if you have ipkg set up... – alfonx Mar 20 '17 at 0:44

Mount the Synology volume from a Linux workstation running Gnome, and run Disk Usage Analyzer on it.

  • but than i dont get stuff like: /volume1/@cloudstation/ – kimliv Jan 21 '15 at 16:20

ncdu is now available as a community package, you can install via package manager

See details on https://synocommunity.com


Because the IPKG stuff does not work for me on a DS218+, because the ipgk installes a wrong version of ncurses (needed by ncdu), the most easy way for me is using "docker".

For example: https://hub.docker.com/r/bernadinm/ncdu (there are many more)

  • install the container
  • docker run -it -v /:/mount bernadinm/ncdu /mount

and you have full functional "ncdu" without any problems and you don´t have to install any package installers or mess with your system.

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