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Quick overview of Disk Test (Magic Benchmark)
Disk Test by Magic Benchmark is a free iPhone utility that measures how fast your device reads and writes data. It gives an easy, visual way to spot slowdowns in storage performance and compare internal storage against attached drives.
What the app checks
- Read and write throughput for the iPhone’s internal storage
- Performance of any connected storage devices and interfaces
- The impact of different cables and file system types on transfer speeds
Why this is useful
Testing storage speed helps you identify bottlenecks before they interrupt your work. The app highlights how the phone and external media interact, so you can make informed decisions about which accessories or formats to use for large files.
Devices and media it supports
- Memory cards and card readers connected via suitable adapters
- External hard drives and SSDs hooked up through the Lightning/USB-C interface
- USB flash drives attached with the proper connector
How it helps your workflow
By comparing speeds across devices and setups, Disk Test lets you:
- Choose cables and adapters that don’t degrade performance
- Pick the most appropriate file system for fast transfers
- Reduce time spent copying or opening large media files
User experience
The interface is straightforward and geared toward quick assessments. With minimal setup you can run tests and immediately see where slowdowns occur, making it practical for photographers, videographers, and anyone who moves large files frequently.
Technical
- iPhone
- Free