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You cannot create a (sub)folder in the root directory of the external storage on Android 11+.
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You can only create a new subfolder in one of the Shared folders (like e.g.
/Downloador/Documents). -
The File component uses/needs a relative path (not an absolute path). With
FileScope=Appit is just the fileName. WithFileScope=Shared or Legacythe path is relative to the root directory of the external storage (/storage/emulated/0).
See also here: Some basics on Android storage system