MSD-A1 Series

A1/UHS-I UHS Speed Class 1-ready microSD memory card
MSD-A1 Series
- 32GB
- 64GB
- 128GB
Apps work with ease! Supports A1
Best microSD card for smartphones and gaming equipment
The microSD card conforms to Application Performance Class 1 (A1), the speed standard for smartphone apps. When used as a built-in memory for smartphones, the smartphone app startup time and photo apps' reading speed stabilize, making the use of smartphones a breeze.
Features
Saves apps work with ease

*Independently verified by our company. Please refrain from contacting the manufacturer.
Apps work with ease – Conforms to the new A1 standard
Application Performance Class 1 (A1)
The A1 standards state that an SD card must provide a random read speed over 1500 IOPS, a random write speed over 500 IOPS, and a sustained sequential write speed of at least 10 MB/s.
As a result, the speed of starting up smartphone apps and reading data with a photo app is stabilized, making the use of smartphones more comfortable.
Transfer at a speed of up to 104 MB/s! Supports UHS Speed Class
Compatible with UHS-I, an interface that achieves high-speed, stable transfer. It can read and write at a speed of up to 104 MB/s (standard rate) and meet the need for handling large volumes at high speed. It is also UHS Speed Class 1-ready, guaranteeing a transfer speed of 10MB/s for UHS compatible devices.
What’s a UHS-I?
Although a UHS-I interface memory card can work with non-compatible devices, it performs best when used with UHS-I interface compatible devices.
Supports UHS Speed Class 1
Among the UHS-I standards, it supports Speed Class 1. It also supports Class 10, with both guaranteeing a transfer speed of 10 MB/s.
Class | Minimum speed during continuous data writing |
SD bus mode | Application | ||
---|---|---|---|---|---|
UHS Speed Class | 3 | 30 MB/s | UHS-II UHS-I |
4K/Full HD (2K) video recording | |
1 | 10 MB/s | Full HD (2K) video recording | |||
Speed Class | 10 | 10 MB/s | High-speed(HS) | Full HD (2K) video recording | |
6 | 6 MB/s | Default speed(DS) | Full HD (2K)/HD video recording | ||
4 | 4 MB/s | ||||
2 | 2 MB/s | SD video recording |
Boost your smartphone/tablet storage capacity!
Compatible with Nintendo Switch™
It is compatible with Nintendo Switch™.
It can expand the storage capacity when saving downloaded files and screenshots.
Other handy functions
It will not be affected by X-Ray hand baggage scanning at airports.
It conforms to the international ISO7816-1 standard.
Saved data will not be affected by X-Ray scanning at airports.
Waterproof means peace of mind if it gets wet.
The microSD card is waterproof (IPX7, 1 meter).
*The card only. Use a dry cloth to wipe away moisture and dry the card before use.
Specifications
Compatible models
- microSDHC and microSDXC-ready devices.
- Nintendo Switch™
Limits to supporting models
32GB model
*It can only be used with microSDHC devices and those specified in the manual. Since it is incompatible with conventional microSD, it cannot be used with devices that only support microSD memory cards.

64GB/128GB model
*It can only be used with devices bearing the microSDXC logo and those specified in the manual. Since it is incompatible with conventional microSD and microSDHC, it cannot be used with devices that only support microSD and microSDHC memory cards.

microSD card-supporting equipment
microSD, microSDHC, and microSDXC memory cards are incompatible with lower standards. Please refer to the table below for devices that can be used.
microSD card | This product microSDHC cards ![]() |
This product microSDXC cards ![]() ![]() |
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microSD-supporting device | ![]() |
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microSDHC-supporting device | ![]() |
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microSDXC-supporting device | ![]() |
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Specifications
Model number | MSD-A1-32G | MSD-A1-64G | MSD-A1-128G | |
---|---|---|---|---|
Capacity | 32GB | 64GB | 128GB | |
microSD/SD card standard | microSDHC | microSDXC | ||
Model type | UHS-I | |||
Speed Class |
UHS Speed Class | Speed Class 1 | ||
SD Speed Class | Class 10 | |||
Application Performance Class |
Application Performance Class 1 (A1) | |||
External dimensions | 11.0 (W) ×15.0 (D) ×1.0 (H) mm, SD Card adapter : 24.0 (W) x 32.0 (D) x 2.1 (H) mm | |||
Mass | Approximately 0.25 g | |||
Mass (packaged) | Approximately 11 g | |||
Source voltage | 2.7 to 3.6 V | |||
Operating temperature range | 0 to 55℃ | |||
Operating humidity limits | 20 to 80%(no condensation) | |||
Warranty period | Hardware warranty (two year) | |||
Compliant standards | SD Memory Card Specification Ver5.10 compliant | |||
Various certifications obtained | RoHS Directive (10 substances), WEEE Directive, CE, and REACH Regulation compliant. | |||
Notes | Waterproof performance* JIS IPX7 class | |||
Accessories | SD Card adapter | |||
About warranty | EN/ES/FR/IT/PT/DE/SE/DK/NL/FI/PL/CZ/HR/SK/HU/RO/CS/BG/GR |
*This product has undergone the JIS IPX7 Class test (formerly the JIS Protection Grade 7 Immersion test) and was verified to seal out water when gently submerged in room temperature tap water at a depth of one meter for thirty minutes (based on our study). Although this product is waterproof at the time of shipment, we cannot guarantee that it will retain its waterproof performance due to age deterioration and other external factors. Do not intentionally immerse this product in liquid. Wipe away any moisture with a dry cloth before using.
- Disposal Information
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For Users of Waste Electrical & Electronic Equipment (Europe only)
This symbol on the product means that it is a piece of electrical and electronic equipment that
should not be mixed with general household waste.
The correct disposal will help prevent potential negative effects on human health and the environment. For the proper handling, recovery and recycling of used products, please take them to applicable collection points, according to your national laws. For more information about the collection and recycling of used products, please get in touch with your local authority, your waste disposal service, or the original vendor.
This symbol is relevant to the directive 2006/66/EC Article 20 Information for end-users and Annex II. (EU countries only) The symbol means that batteries and accumulators should be disposed of separately from your household waste at their end-of-life. If a chemical symbol is printed beneath the symbol shown above, it means that the battery or accumulator contains a heavy metal at a certain concentration. They are as shown below.Hg: mercury (0.0005%), Cd: cadmium (0.002%) and Pb: lead (0.004%) These substances may cause serious damage to humans and the global environment. In the European Union, there are separate collection systems for used batteries and accumulators. Please dispose of batteries and accumulators correctly at your local community waste collection/recycling centre.
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In other Countries outside the European Union This symbol is only valid in the European Union. If you wish to discard these items, please contact your local authority or dealer and ask for the correct method of disposal.
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CE DECLARATION OF CONFORMITY
We declare under our sole responsibility that the product:
- Product Name
- microSD Memory Card
- Model Number
- MSD-A1-32G. MSD-A1-64G, MSD-A1-128G
- Brand Name
- I-O DATA DEVICE, INC.
to which this declaration relates, is in conformity with the protection requirements of the following Council Directives:
- EMC
- Directive 2014/30/EU
- RoHS
- Directive 2011/65/EU
The mentioned device has been successfully tested against the following standards:
- EN 62479:2010
- EN 55032:2012/AC2013
- EN 55024:2010
- EN 63000-1:2018
Authorised representative in Europe
MEDIA ELECTRONICS S.L,
- Location
- Av. Siglo XXI, 34 - 08840, Viladecans, Barcelona, Spain
EU Representative
MEDIA ELECTRONICS S.L,
- Location
- Av. Siglo XXI, 34 - 08840, Viladecans, Barcelona, Spain
- Tel
- +34 936546120
- Fax
- +34 936542176
- VAT
- ESB62974084
Manufacturer
I-O DATA DEVICE, INC.
- Location
- 3-10 Sakurada-machi, Kanazawa-shi, Ishikawa-ken, Japan 920-8512