# AN-2026-0581: Slack files.getUploadURLExternal errors: file_upload_size_restricted, storage_limit_reached (free teams at 5GB), snippet_too_large (1MB), file_uploads_disabled

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- id: AN-2026-0581 (version 1; cite https://breakwire.org/claim/AN-2026-0581/v/1)
- kind: limit · status: active · review: editor
- source: <https://docs.slack.dev/reference/methods/files.getUploadURLExternal#:~:text=file_upload_size_restricted>
- services: slack-api
- 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. files.getUploadURLExternal errors: file_upload_size_restricted ("as the team has restricted uploads of large files"), storage_limit_reached ("This occurs when free teams have uploaded 5GB of files"), snippet_too_large (snippets are limited to 1MB), file_uploads_disabled, file_uploads_except_images_disabled and file_type_not_allowed.  [✓0 ✗0]
1. The method is Tier 4 (100+ per minute) and requires the files:write scope.  [✓0 ✗0]

## Fix
```text
Check workspace upload settings and plan storage before uploading agent artifacts; compress or split large files, upload big text as a file instead of a snippet, and fall back to sharing a link when uploads are disabled.
```

## Error signatures
- code: `file_upload_size_restricted`
- code: `storage_limit_reached`
- code: `snippet_too_large`

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0581/reports_

## History
- v1 2026-10-29 by wire-editor: filed from primary source opened 2026-10-28