For reference and comparison purposes only, I try to test all Secure Digital memory cards (SD / SDHC / SDXC, including Mini and Micro) that come my way using CrystalDiskMark v9.0.1 (64-bit) with default settings and collect the results, including model data and similar information, here.
Large to very large memory cards (=> 128 GB) in particular are permanently installed in devices and are therefore only listed here when the opportunity arises.
All tests are performed on my workstation, which is based on an ASUS ROG Crosshair VIII Dark Hero (AMD X570 / AM4), using the USB-A 3.2 Gen. 1 port on the front panel: Adapted by a very fast USB 3.1 Gen. 1 card reader from Kingston, the MobileLite Plus (UHS-II).
As with the USB sticks, I chose the test sizes and file systems as follows:
| <= 128 MB | <= 1 GB | <= 32 GB | => 32 GB | |
|---|---|---|---|---|
| File system | FAT | FAT32 | FAT32 | exFAT |
| Test size | 64 MB | 512 MB | 1 GB | 4 GB |
| Runs | 5 | 5 | 5 | 5 |
The results are sorted in ascending order, starting with the lowest storage capacity.
SD / SDHC / SDXC
| Capacity | Manufacturer | Description | Read (MB/s) | Write (MB/s) | Screenshot | Date |
|---|---|---|---|---|---|---|
| 128 MB | Lexar Media | SD128-100M 1204261 AO411034 MADE IN U.S.A. | 7.55 7.53 4.72 4.55 | 4.19 4.19 0.30 0.30 |  | 2025.06.24 |
| 128 MB | Nagiwara SYS-COM | Model No. HRC-SD128M | 3.56 3.56 0.51 0.34 | 1.47 1.47 0.17 0.16 |  | 2025.06.24 |
| 128 MB | Sigma | SD128MBM04S0437 Made in Taiwan | 8.39 8.38 5.13 5.10 | 6.90 7.12 0.16 0.16 |  | 2025.06.24 |
| 512 MB | SanDisk | AX0620202617D Made in China | 11.95 11.95 4.24 3.97 | 5.24 5.45 0.05 0.05 |  | 2025.06.24 |
| 1 GB | Intenso | “SD Memory Card” | 15.72 15.72 6.12 5.66 | 4.40 4.40 0.02 0.02 |  | 2025.06.24 |
| 1 GB | Hama | “Secure Digital Card” S442TN01G E0BB 0646 | 10.48 10.48 4.52 2.14 | 2.73 2.73 0.03 0.03 |  | 2025.06.24 |
| 4 GB | Müller | SDHC | 19.70 19.71 6.36 5.80 | 7.74 8.38 0.02 0.02 |  | 2025.06.24 |
| 8 GB | Netac | NT202006 SDHC Class 10 | 41.06 41.49 6.83 6.76 | 7.76 11.74 0.86 0.94 |  | 2025.06.24 |
MiniSD / MiniSDHC / MiniSDXC
| Capacity | Manufacturer | Description | Read (MB/s) | Write (MB/s) | Screenshot | Date |
|---|---|---|---|---|---|---|
| 1 GB | Memorex | G01GNMC690053 | 12.15 12.34 5.95 4.27 | 8.58 10.69 0.05 0.05 |  | 2025.06.24 |
MicroSD / MicroSDHC / MicroSDXC
| Capacity | Manufacturer | Description | Read (MB/s) | Write (MB/s) | Screenshot | Date |
|---|---|---|---|---|---|---|
| 2 GB | SanDisk | MicroSD Made in China | 19.91 19.92 3.41 3.38 | 3.77 3.77 0.55 0.55 |  | 2025.06.24 |
| 2 GB | SanDisk | MicroSD Made in China | 11.95 11.95 4.39 4.31 | 4.39 4.40 0.03 0.03 |  | 2025.06.24 |
| 2 GB | ? | MMAGRO20UECA-M8 D FDDO41PA 019 Made in KOREA | 15.94 16.14 1.56 1.38 | 5.45 6.28 0.08 0.03 |  | 2025.06.24 |
| 4 GB | Toshiba | Class 4 C04G TAIWAN | 23.90 24.07 7.25 6.47 | 9.00 12.76 0.99 1.09 |  | 2025.06.24 |
| 8 GB | ? | Class 6 | 6.08 6.08 2.08 2.06 | 3.97 4.19 0.47 0.47 |  | 2025.06.24 |
| 16 GB | SanDisk | Ultra Class 10 5325YKA852NU BL Made in Malaysia | 77.66 78.21 6.60 6.28 | 28.68 23.02 2.26 2.15 |  | 2025.06.24 |
| 16 GB | SanDisk | Ultra U1 33810G4AX157 BL Made in China | 47.12 47.48 5.77 5.32 | 11.30 11.95 2.59 2.10 |  | 2025.06.24 |
| 16 GB | Toshiba | Exceria U1 TAIWAN | 94.97 96.46 6.89 6.64 | 7.75 11.52 0.54 0.53 |  | 2025.06.24 |
| 32 GB | SanDisk | Ultra Class 10 0447XX6521UL BM Made in China | 97.72 98.44 8.68 8.61 | 23.06 24.07 2.40 2.36 |  | 2025.06.24 |
| 32 GB | SanDisk | Ultra Class 10 0447XX6521W7 BM Made in China | 97.75 98.35 8.70 8.62 | 23.66 24.11 2.36 2.34 |  | 2025.06.24 |
| 32 GB | SanDisk | Ultra Class 10 0447XX6521US BM Made in China | 97.87 98.32 8.66 8.60 | 22.43 23.05 2.37 2.31 |  | 2025.06.24 |
| 64 GB | SanDisk | Ultra Class 10 5406DRAXYOMX BN Made in China | 97.69 98.12 7.36 6.75 | 12.36 23.04 1.96 1.93 |  | 2025.06.24 |