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OxygenOS Error 255 with user 999

  1. O1547591127838
    Cupcake Aug 13, 2019

    O1547591127838 , Aug 13, 2019 :
    Hello everyone. Im having some problems when i try to do a backup of my phone via TWRP. I get error 255. I already tried pm remove-user 999. But i still get this error.

    I noticed i still have folders named 999 in the following paths:

    /proc/irq/
    /sys /kernel/irq/

    Then a 9999 folder in
    /proc/uid/

    And a user_999 folder in
    /data/misc/keystore/

    I want to update my phone. Do you think i can make a backup some other way or even update without making a backup? Do you think i will encounter any error?
     

    #1
  2. The1Lion
    Marshmallow Aug 13, 2019

    The1Lion , Aug 13, 2019 :
    Try using OnePlus Switch to backup data?
     

    #2
  3. O1547591127838
    Cupcake Aug 14, 2019

    O1547591127838 , Aug 14, 2019 :
    But that doesn't backup system. Right?
     

    #3
  4. Kytharsis
    Marshmallow Aug 14, 2019

    Kytharsis , Aug 14, 2019 :
    Wait, why? Unless you made changes to /system (which I highly avoid) there's no need to back it up.
     

    #4