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    Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first

    USB Boot with SD Card for RetroPie Partition

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    • T
      thedoctor916
      last edited by thedoctor916

      Hi,

      I am having trouble using a USB to boot and a SD card for the RetroPie Partition with a RPi4b. It seems all the docs and forums are for the other way around.

      I have a booting USB stick that was created with Raspberry Pi Imager. I guess this is new functionality for the 4/400.

      I am using the Running ROMs from a USB drive page in the help docs and modifying it where necessary for doing the opposite.

      I have ignored the part about terminating the USB service. I mount the SD card to /media/SD1 (temporarily) and attempted to move the RetroPie directory to the SD card. I am getting a permission error: "mv: failed to preserve ownership for '...' : operation not permitted".

      How do I get around this? Is this because the USB service has not been stopped, is the guide wrong or does the guide not work in reverse?

      Thanks for the help!

      T 1 Reply Last reply Reply Quote 0
      • T
        thedoctor916 @thedoctor916
        last edited by

        Can I answer my own question?

        The problem was the SD Card was formatted with exFAT not FAT32. I unknowingly used exFAT because FAT32 formats do not work properly with Raspberry Pi Imager in Windows 10. Yes, I said that. So I formated the SD Card using Raspberry Pi Imager in OS X and it worked.

        All permission issues when moving the RetroPie directory and copy ROMs are gone. I assume in the official docs some where it says don't use exFAT. I read somewhere else it was okay!

        I hope this helps someone in the future as this config becomes more popular.

        mituM 1 Reply Last reply Reply Quote 0
        • mituM
          mitu Global Moderator @thedoctor916
          last edited by

          @thedoctor916 said in USB Boot with SD Card for RetroPie Partition:

          I assume in the official docs some where it says don't use exFAT. I read somewhere else it was okay!

          It is ok, but the method used by RetroPie is not mv, but rsync.

          T 1 Reply Last reply Reply Quote 0
          • T
            thedoctor916 @mitu
            last edited by

            @mitu the docs say:

            "sudo mv -v /home/pi/RetroPie/* /media/usb0/"

            Otherwise I'm not sure ro what you might be refering to.

            mituM 1 Reply Last reply Reply Quote 0
            • mituM
              mitu Global Moderator @thedoctor916
              last edited by

              @thedoctor916 said in USB Boot with SD Card for RetroPie Partition:

              Otherwise I'm not sure ro what you might be refering to.

              I was referring to the automatic transfer method, that uses usbmount.

              1 Reply Last reply Reply Quote 0
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