adb error: couldn't create file: Permission denied about appium-geckodriver HOT 4 OPEN

[GeckoDriver@7133 (736c9dd5)] Got response with status 500: {"value":{"error":"unknown error","message":"adb error: couldn't create file: Permission denied","stacktrace":""}}

As you can see there the error os coming from geckodriver itself. You could assign the verbosity capability to trace in order to see more detailed geckodriver output and attach the resulting log here

from appium-geckodriver.

also I can observe this error in the linked issue report:

[debug] [GeckoDriver@03b7 (1d39ac55)] 1677837573945 mozdevice TRACE execute_host_command: >> "shell:su 0 chmod -R 777 /sdcard/Android/data/org.mozilla.fenix/files/test_root/org.mozilla.fenix-geckodriver-profile"

have you tried to run it manually from the terminal? what was the output?

from appium-geckodriver.

So, if I run adb shell "su 0 chmod -R 777 /sdcard/Android/data/org.mozilla.fenix/files/test_root/org.mozilla.fenix-geckodriver-profile" from the terminal I receive a No such file or directory response.
If I check the emulator file system, I can see that these files don't exist on the sdcard. Also, given the fact that the emulator is rooted, shouldn't internal storage take precedence when a new file is created? I am a bit confused why the program chooses the external storage.

from appium-geckodriver.

I don't know. I assume there might be some bug in the geckodriver itself, so it verifies folder existence first or runs mkdir -p before running chmod

You could probably also play with appium:androidStorage capability value

from appium-geckodriver.