# Jazz Disk Bench Pro

> Storage Speed Test

Canonical page: [https://chrome-stats.com/d/id1298441490](https://chrome-stats.com/d/id1298441490)

## Overview

- **ID:** `id1298441490`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Baofeng County Jixu Education Information Consulting Co., Ltd.
- **Category:** Utilities
- **Rating:** 4.40 / 5 (28 ratings)
- **Version:** 7.1.1
- **Last updated:** 2026-06-16
- **First published:** 2017-10-22
- **Size:** 66 MB
- **Data as of:** 2026-09-10
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/jazz-disk-bench-pro/id1298441490)
- **Website:** [https://www.jazzdiskbench.com/](https://www.jazzdiskbench.com/)
- **Privacy policy:** [https://www.jazzdiskbench.com/privacypolicy.html](https://www.jazzdiskbench.com/privacypolicy.html)

## Description

Accurate disk storage speed test and benchmark. Sequential, 4K random, and stress test.

Jazz Disk Bench is a pro-grade storage performance measurement tool designed for SSDs, SD cards, and internal/external storage. Get accurate data on your device's throughput with industry-standard testing methods.

Key Features:
* Sequential Speed Test: Measure peak performance for copying large files (movies, games, etc.).
* 4K Random IOPS: Evaluate system responsiveness. Low random performance is often the root cause of device lag.
* Pro Stress Test: Push your storage to the limit with 2GB–100GB tests to check stability and "real" NAND speed after cache exhaustion.
* External Storage Support: Fully compatible with USB drives and SD cards via custom folder selection.

Benchmark Details:
* Sequential Test: Reads/writes 16MB blocks sequentially. Perfect for testing raw transfer speeds.
* Random Test (4K): Reads/writes 4KB blocks at random locations. This reflects how fast your OS launches apps and handles small files.
* Stress Test: Sequentially writes massive data (up to 100GB). Ideal for pro users to test SLC cache size and sustained NAND write performance.

Note: For external storage tests, ensure a stable connection and write permissions.

## Rankings

- #221,586 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id1298441490)