This may be an obvious question since the permissions are waterfall, but please let me know if you know.

I created a custom app with admin rights and approved it on the admin console.

After that, I uploaded a file via the API, but the file is uploaded even if I specify a folder other than the parent ID of the specific folder.

I have approved the email address associated with the service account ID as the collaborator for the specific folder, but not the others.

Since I have created the app as an administrator, I believe I have access to all folders, is this correct?

If anyone knows of any other workarounds, please let me know.

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