Metadata files should not be written on USB devices

When you access directories with Apple Finder, hidden meta information will be written in a file named .DS_Store (Desktop Service Store). The meta information contains individual view settings for every folder and maybe sensitive information. Turn off the creation off meta data on USB devices.

How to fix it

macOS 10.11 – 14

  1. Open terminal.app
  2. Enter and press return:
    defaults write com.apple.desktopservices DSDontWriteUSBStores -bool true
  3. Log off and log on or restart your Mac
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Keep in mind: not every security and privacy setting is suitable for everyone. Enhancing the security can lead in losing functionality and/or comfort.
Before making changes, please backup your Mac! Do not make too many change at once. After changing your Mac, check if your normal usage of your Mac has changed in a way which fits to you. Are your really willing to loose some functionality and/or comfort?
Most important is, that you learn and understand what are the advantages and disadvantages of the security settings and that you are aware about the capabilities and risks of your Mac configuration.

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