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Storage performance
Sequential read
MiB/s · higher is fasterB is 0.07% higher than A
Sequential write
MiB/s · higher is fasterB is 19.43% lower than A
4 KiB random read
MiB/s · higher is fasterB is 8.21% higher than A
4 KiB random write
MiB/s · higher is fasterB is 5.80% lower than A
Configuration details
| Detail | A · samsung SM-S926U1 · 512 GB | B · samsung SM-S921U · 256 GB |
|---|---|---|
| Platform | Android | Android |
| Sample count | 16 | 3 |
| Latest measurement | 2024-09-23 | 2026-05-15 |
| Random read IOPS | 17,431 | 18,862 |
| Random write IOPS | 16,529 | 15,570 |
| 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.