HP · Memory cards
HP mx350 256 GB microSDXC Memory Card
The mx350 is a microSDXC card for expanding storage in a compatible mobile device or camera. Published read performance is up to 100 MB/s, with random reads quoted up to 4000 IOPS; actual performance depends on the host.
Useful features
At a glance256 GB nominal storage
256 GB nominal storage: provides removable space for files and recordings, with usable formatted capacity below the total.
microSDXC with UHS-I
microSDXC with UHS-I: combines the small card format with the interface for compatible hosts and readers.
U3 and V30 classifications
U3 and V30 classifications: help match the card to a camera's sustained-recording requirements.
A2 app-performance rating
A2 app-performance rating: supports relevant app workloads when the Android hardware and operating system support A2 functions.
Reads up to 100 MB/s
Reads up to 100 MB/s: supports retrieving saved files, with real performance dependent on the host and test conditions.
SD adapter included
SD adapter included: lets the microSDXC card fit an appropriate full-size SDXC connection.
Random-read figure
Random-read figure: up to 4000 IOPS is a maximum, not a guaranteed minimum for every device.
The useful features
- 256 GB nominal storage: provides removable space for files and recordings, with usable formatted capacity below the total.
- microSDXC with UHS-I: combines the small card format with the interface for compatible hosts and readers.
- U3 and V30 classifications: help match the card to a camera's sustained-recording requirements.
- A2 app-performance rating: supports relevant app workloads when the Android hardware and operating system support A2 functions.
- Reads up to 100 MB/s: supports retrieving saved files, with real performance dependent on the host and test conditions.
- SD adapter included: lets the microSDXC card fit an appropriate full-size SDXC connection.
- Random-read figure: up to 4000 IOPS is a maximum, not a guaranteed minimum for every device.
The useful details
Know what
you’re getting.
The mx350 is a microSDXC card for expanding storage in a compatible mobile device or camera.
Published read performance is up to 100 MB/s, with random reads quoted up to 4000 IOPS; actual performance depends on the host. A2 app functions also require compatible phone hardware and operating-system support. The included SD adapter permits use in an appropriate full-size SDXC slot. Formatting and other functions reduce available capacity below the nominal figure.
The combination of recording and app-performance ratings makes the card relevant to several different uses, provided the host supports the required functions. A camera may specify U3 or V30 for a recording mode, while an Android device needs compatible hardware and software to benefit from A2. Those markings are useful buying criteria, not a guarantee that every device will enable every mode. The 256 GB nominal capacity gives room for a larger collection of files than smaller cards in other ranges, while the SD adapter allows a compatible reader to access the same media. Follow the host's formatting and safe-removal procedure to manage files correctly.
A 256 GB microSDXC storage card with UHS-I, U3, V30 and A2 ratings, supplied with an SD adapter.
Stores digital files and makes them available to a compatible connected host.
Expanding removable file storage in a compatible camera or mobile device, including recording and app workloads whose requirements match the card's ratings.
Users whose device supports the card or connector format and selected capacity.
The host writes data to flash memory and reads it back through the interface.
A closer look
Specifications.
The details that matter.
Specifications
Compatibility
A host supporting microSDXC/SDXC and the selected capacity; app and recording capabilities also depend on host support.
App and setup
Confirm host interface, supported capacity and file-system requirements. Follow the host instructions for formatting and safe removal.
Published read performance is up to 100 MB/s, with random reads quoted up to 4000 IOPS; actual performance depends on the host. A2 app functions also require compatible phone hardware and operating-system support. The included SD adapter permits use in an appropriate full-size SDXC slot. Formatting and other functions reduce available capacity below the nominal figure.
Published accessory information:
Included adapter: SD adapter

