---
title: fileTransferWarningSize
framework: TelephonyMessagingKit
role: symbol
role_heading: Instance Property
platforms: [iOS 26.0+]
path: telephonymessagingkit/rcsservice/configuration/filetransferwarningsize
---

# fileTransferWarningSize

The size for issuing a warning about file transfers and Rich Card media objects.

## Declaration

```swift
let fileTransferWarningSize: Measurement<UnitInformationStorage>?
```

## Discussion

Discussion This value is equivalent to FT WARN SIZE in the RCS specification. Consult the specification for handling pre-recorded video that uses a resolution greater than 480p encoded at 1200 kbps. The specification’s guidance differs based on whether the file size is less than or greater than the warning size value. Your app may need to warn the person sending the video or force recompression to reduce its size. This value is represented as a Foundation Measurement that uses the UnitInformationStorage unit type. If the warning size isn’t applicable, the value is nil.

## See Also

### Inspecting file transfer configuration

- [maximumFileTransferSize](telephonymessagingkit/rcsservice/configuration/maximumfiletransfersize.md)