# FILE_ALLOCATE_KEEP_SIZE

`import { FILE_ALLOCATE_KEEP_SIZE } from "destack:fs/binding";`

Allocate blocks without extending apparent file size.

```ds title="FILE_ALLOCATE_KEEP_SIZE"
const FILE_ALLOCATE_KEEP_SIZE: FileAllocateFlags
```

[language/library/src/fs/binding/file.ds:147](https://github.com/destack-sh/destack/blob/main/language/library/src/fs/binding/file.ds#L147)