# X_STORAGE_TYPE_REJECTED

## Means

content type is not allowed for this upload

## Typical cause

a type absent from `allowedContentTypes`, or magic bytes that disagree with the declared `Content-Type` — the bytes win

## Fix

add the declared type to `allowedContentTypes` in the upload policy, or re-upload with the `Content-Type` `cause` sniffed

[Storage](/error-codes#storage)