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Models with the most samples
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Storage performance
Sequential read
MiB/s · higher is fasterB is 1.58% higher than A
Sequential write
MiB/s · higher is fasterB is 16.50% higher than A
4 KiB random read
MiB/s · higher is fasterB is 10.11% higher than A
4 KiB random write
MiB/s · higher is fasterB is 18.66% lower than A
Configuration details
| Detail | A · samsung SM-S9420 · 256 GB | B · samsung SM-S9480 · 1024 GB |
|---|---|---|
| Platform | Android | Android |
| Sample count | 1 | 1 |
| Latest measurement | 2026-08-27 | 2026-09-30 |
| Random read IOPS | 26,131 | 28,773 |
| Random write IOPS | 38,191 | 31,066 |
| All capacities | View Model → | View Model → |
Results checked · Speeds in MiB/s · About these measurements
Four tests. A clearer comparison.
Compare sequential and 4 KiB random read/write speeds side by side. Every option includes its Model, capacity and platform. You can compare 512 GB with 256 GB, including two capacities of the same Model.