SanDisk
SanDisk 32GB microSDHC Extreme Pro 95MB/s UHS-I U3 Class 10 633X with microUSB OTG USB 2.0 Reader
A 32 GB microSDHC card rated Class 10 UHS-I U3 with up to 95 MB/s read and 90 MB/s write, bundled with a microUSB OTG USB 2.0 reader
- typemicroSDHC
- Capacity32GB
- Speed Class RatingClass 10 UHS-I U3
- Read Speedup to 95MB/s
- Write Speedup to 90MB/s
- 32 GB capacity stores hours of 4K video
- Read speeds up to 95 MB/s transfer files quickly
- Write speeds up to 90 MB/s capture burst photos smoothly
- UHS-I U3 Class 10 rating guarantees sustained 4K recording
- Included microUSB OTG 2.0 reader connects directly to phone
Capacity and speed class
This SanDisk Extreme Pro microSDHC card delivers 32GB of storage with a Class 10 UHS-I U3 rating. Read speeds reach up to 95MB/s and write speeds up to 90MB/s. The bundle includes a microUSB OTG USB 2.0 reader for direct connection to compatible devices. An SD adapter is also supplied for use in standard card slots.
Best for mobile 4K capture; not for larger libraries
The U3 speed class supports 4K video recording on phones, tablets and action cameras that accept microSDHC media. The OTG reader lets you offload footage to a USB OTG-capable smartphone or tablet without a computer. Buyers who need more than 32GB of capacity should consider a higher-capacity card. Devices limited to standard SDHC speeds will not benefit from the UHS-I bus.
UHS-I U3 speed class
The single specification that decides suitability is the UHS-I U3 rating, which certifies the card for sustained 4K video capture. If your device requires this speed class, the card meets it. If the device only supports lower speed classes, the extra headroom goes unused.
Highlights
- 32 GB capacity stores hours of 4K video
- Read speeds up to 95 MB/s transfer files quickly
- Write speeds up to 90 MB/s capture burst photos smoothly
- UHS-I U3 Class 10 rating guarantees sustained 4K recording
- Included microUSB OTG 2.0 reader connects directly to phone
Specifications
| type | microSDHC |
|---|---|
| Capacity | 32GB |
| Speed Class Rating | Class 10 UHS-I U3 |
| Read Speed | up to 95MB/s |
| Write Speed | up to 90MB/s |
Questions about this item
How do I install the microSDHC card and the microUSB OTG reader, and what step do people often get wrong?
Insert the 32GB microSDHC card into the reader, then plug the reader into a device that supports USB OTG. The common mistake is using the reader on a phone or tablet that lacks OTG support.
What maintenance or replacement will the card and reader need over time?
The card has no moving parts and requires no scheduled maintenance. Replace it if write speeds drop below the rated 90MB/s or if the device reports read errors.
What limit appears first during sustained heavy use of the card?
Sustained write throughput is capped at up to 90MB/s, which will be reached before the 95MB/s read ceiling during continuous recording or large file transfers.
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