# X_STORAGE_MULTIPART_UNSUPPORTED

## Means

this disk cannot take an upload in parts

## Typical cause

a custom StorageDriver declares no multipart capability, and grantMultipart was asked to open a session on it

## Fix

`implement StorageDriver.multipart on the driver, or grant one PUT with grantUpload({ disk, orgId, request })`

[Storage](/error-codes#storage)