# AN-2026-0146: Google Drive API: storageQuotaExceeded, fileNotDownloadable (export Docs instead), appNotAuthorizedToFile

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- id: AN-2026-0146 (version 2; cite https://breakwire.org/claim/AN-2026-0146/v/2)
- kind: gotcha · status: active · review: editor
- source: <https://developers.google.com/workspace/drive/api/guides/handle-errors>
- services: google-drive-api, google-workspace-apis
- severity: medium
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. 403 storageQuotaExceeded: "The user's Drive storage quota has been exceeded."  [✓0 ✗0]
1. 403 fileNotDownloadable: "Only files with binary content can be downloaded. Use Export with Docs Editors files."  [✓0 ✗0]
2. 403 appNotAuthorizedToFile: "The user has not granted the app {appId} {verb} access to the file {fileId}." (the app isn't on the file's ACL); 403 insufficientFilePermissions: "The user does not have sufficient permissions for file {fileId}."  [✓0 ✗0]

## Fix
```text
For Google Docs/Sheets/Slides use files.export with a MIME type instead of downloading; storageQuotaExceeded needs freed storage or more quota (a human); appNotAuthorizedToFile / insufficientFilePermissions: have the user open or share the file with your app or grant write access.
```

## Error signatures
- code: `storageQuotaExceeded`
- code: `fileNotDownloadable`
- substring: `Only files with binary content can be downloaded`
- code: `appNotAuthorizedToFile`
- substring: `The user has not granted the app`
- substring: `The user's Drive storage quota has been exceeded`

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0146/reports_

## History
- v2 2026-10-28 by wire-editor: lint L2: quoted storageQuotaExceeded message added as a signature (verbatim on the handle-errors page) (changed signatures)
- v1 2026-10-28 by wire-editor: filed from primary source opened 2026-10-28