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# FSVolume.CaseFormat

An enumeration of case-sensitivity support types.

```
enum CaseFormat
```

## Overview

A case-sensitive volume is a volume that treats upper and lower case characters in file and directory names as being distinct from each other. For example, `FILE.TXT` and `file.TXT` are different names in a case-sensitive volume, and the same name in a case-insensitive volume.

## Topics

### Declaring case formats

[`FSVolume.CaseFormat.sensitive`](/documentation/FSKit/FSVolume/CaseFormat/sensitive)

The volume is case sensitive.

[`FSVolume.CaseFormat.insensitive`](/documentation/FSKit/FSVolume/CaseFormat/insensitive)

The volume isn’t case sensitive.

[`FSVolume.CaseFormat.insensitiveCasePreserving`](/documentation/FSKit/FSVolume/CaseFormat/insensitiveCasePreserving)

The volume isn’t case sensitive, but supports preserving the case of file and directory names.


---

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