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# File-System Events API Usage

Analyze how many file-system events resources your app uses.

## Overview

The data in this report contains information about each client of file-system events. It includes the number of processes that subscribe to file-system events, the number of paths watched, and the string allocation count.

- Territories: Worldwide
- Platforms: iOS, iPadOS.  For more information about iOS and iPadOS, see the Platforms section in [Data Completeness and Corrections](/documentation/Analytics-Reports/data-completeness-corrections).
- Availability:
  - Daily: Every day.
- History: On request, data is available beginning with iOS 17.4 and iPadOS 17.4.
- Completeness: Data from devices that contribute to this report can arrive as late as 8 days after the date it generates on device. You can download recent data daily, but it might be incomplete, and data updates incrementally daily, until all late-arriving events are available.
- Privacy:
  - Includes data from users who have opted to share their data with Apple and developers.
  - Individual rows will only appear if they have a value of 5 or more.
- Data Context: You can analyze your data with additional context by comparing it with the data in the [App Sessions Context](/documentation/Analytics-Reports/app-sessions-context) report, which provides a count of unique devices that use your app on a specific day. For example, if your app performed an action detailed in this report on 10 unique devices on a specific day, and the App Sessions Context report shows there were 100 unique devices running your app that day, then you can approximate that 10% of the devices running your app performed that action.

## Report Fields

|Report Field   |Description                                                           |Data Type|
|---------------|----------------------------------------------------------------------|---------|
|Count          |Number of times the event occurred                                    |`integer`|
|Territory      |Country or region in which the event occurred                         |`string` |
|Date           |Date when the event occurred                                          |`string` |
|Platform       |OS version on the device on which the event occurred                  |`string` |
|Device         |Type of device on which the event occurred                            |`string` |
|Build          |Build of device on which event occurred                               |`string` |
|Unique Devices |The count of unique devices                                           |`integer`|
|Release Type   |Type of software release                                              |`string` |
|Allocated Bytes|Count of string allocation for App Apple ID                           |`integer`|
|Paths Count    |Number of watched paths for App Apple ID                              |`integer`|
|PIDs Count     |Number of file-system events clients (PIDs) with the same App Apple ID|`integer`|

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