## MedplumClient.bulkExport() method

Performs Bulk Data Export operation request flow. See the [FHIR "Bulk Data Export"](https://build.fhir.org/ig/HL7/bulk-data/export.html#bulk-data-export) for full details.

**Signature:**

```typescript
bulkExport(exportLevel?: string, resourceTypes?: string, since?: string, options?: MedplumRequestOptions): Promise<Partial<BulkDataExport>>;
```

## Parameters

| Parameter     | Type   | Description                                                                                                                                     |
|---------------|--------|-------------------------------------------------------------------------------------------------------------------------------------------------|
| exportLevel   | string | _(Optional)_ Optional export level. Defaults to system level export. 'Group/:id' \- Group of Patients, 'Patient' - All Patients.               |
| resourceTypes | string | _(Optional)_ A string of comma-delimited FHIR resource types.                                                                                  |
| since         | string | _(Optional)_ Resources will be included in the response if their state has changed after the supplied time (e.g. if Resource.meta.lastUpdated is later than the supplied _since time). |
| options       | [MedplumRequestOptions](/content/docs/sdk/core.medplumrequestoptions) | _(Optional)_ Optional fetch options.                                                                   |

**Returns:**

Promise<Partial<BulkDataExport>>

Bulk Data Response containing links to Bulk Data files. See the ["Response - Complete Status"](https://build.fhir.org/ig/HL7/bulk-data/export.html#response---complete-status) for full details.