---
title: allowsExternalBinaryDataStorage
framework: coredata
role: symbol
role_heading: Instance Property
path: coredata/nsattributedescription/allowsexternalbinarydatastorage
---

# allowsExternalBinaryDataStorage

A Boolean value that indicates whether the attribute allows external binary storage.

## Declaration

```swift
var allowsExternalBinaryDataStorage: Bool { get set }
```

## Discussion

Discussion true if the attribute allows external binary storage, otherwise false. If this value is true, the corresponding attribute may be stored in a file external to the persistent store itself.

## See Also

### Configuring the behavior

- [allowsCloudEncryption](coredata/nsattributedescription/allowscloudencryption.md)
- [defaultValue](coredata/nsattributedescription/defaultvalue.md)
- [preservesValueInHistoryOnDeletion](coredata/nsattributedescription/preservesvalueinhistoryondeletion.md)
- [valueTransformerName](coredata/nsattributedescription/valuetransformername.md)