SanDisk Ultra microSDXC UHS-I 64GB 120MB/s
The 64GB identity, UHS-I interface and U1, Class 10 and A1 markings support a conditional storage choice. Asubic lists a 120MB/s maximum read specification, while standards guidance explains why class markings and app requirements answer different questions. Choose only after checking the host and the shipment's warranty and accessories; this evidence does not establish sustained speed, app-loading time or endurance for the exact GN6MN card.
Updated 2026-10-07
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Prices and sellers
No price information yet
Conditions and limitations
Exact-model listings and primary standards guidance establish marketed capacity, interface and class meaning. Exact-host performance conditions remain unresolved.
Compatibility
The UHS-I interface is documented by an exact-model listing; no tested combination of this 64GB GN6MN card and a named host was established.
Where sources differ
Read-speed units and regional warranty and bundle descriptions differ across listings. Exact-US documentation was not established; no conflicting numerical reading speed is treated as a measured result.
Reported issues and fixes
Bounded source review did not establish a confirmed issue for this exact variant; other-capacity tests do not establish an issue here.
Care and support
A Japanese seller's six-month shop warranty was found. Exact-US manufacturer support, endurance and repair or replacement terms remain unresolved.
Ownership costs
Regional seller support was researched, but service eligibility, endurance and replacement requirements are unresolved. No prices were collected or ownership-cost total calculated.
Who it suits
Consider only after the host and shipment checks
- Check before buying
- Confirm the full part number and capacity.
- Confirm host requirements, package contents and destination-specific seller support.
- Constraints
- The intended host and workload must be checked.
- Needs
- A marketed 64GB microSDXC storage option.
- Reason
- Identity and class evidence supports consideration, while measured performance, endurance, bundle and US service remain unresolved.
- Tradeoffs
- A listed maximum read speed does not establish sustained writing or application timing.
- Assessment
- conditional
Moglix · CLS · Ryans · Asubic / Toeimusen
Reviewer consensus
Consensus rows require at least two distinct sources for the topic.
| Topic | Positive | Negative | Mixed | Reading | Evidence |
|---|---|---|---|---|---|
| Buyer fit | 1 | 0 | 1 | Mixed · 1/2 | [1], [6] |
| Speed classes and interface | 3 | 0 | 1 | Mostly · 3/4 | [4], [7], [3], [5] |
Single-source notes
The review
SanDisk Ultra: what the available evidence establishes
Identity and stated capacity
This product is the SanDisk Ultra 64GB microSDXC card identified in the retailer evidence as SDSQUA4-064G-GN6MN. Moglix states a storage capacity of 64 GB, CLS lists the UHS-I interface, and Ryans identifies the U1, Class 10 and A1 markings. Together, these records establish the marketed capacity and interface of the variant under consideration. They do not establish usable space after formatting or a tested result on your device. Before comparing another Ultra listing, compare the complete part number and capacity rather than relying on the shared family name. A review or package with a different suffix cannot by itself settle what arrives with this listing, and a test of another capacity is not a measurement of this card. [3], [4], [6]
The practical purchase question starts with the amount of storage you actually need and the host you plan to use. The evidence supports choosing a marketed 64GB variant, but it does not supply a reliable count of games, videos or photographs that will fit. Such a count would require file sizes and available formatted space that these claims do not provide. If your decision depends on a precise remaining capacity, treat that as a check to perform with the intended device rather than an established feature here. The same caution applies to a familiar-looking replacement: the documented identity is useful for narrowing the choice, while your host's requirements still determine whether that choice is appropriate. [3], [4], [6]
Interface and advertised classes
Asubic's exact-model listing gives a maximum reading speed of 120MB/s. That is a retailer specification, not a measured transfer recorded for this ASIN. It should therefore be read alongside the interface and class markings rather than used as a promise for every transfer. The SD Association explains that speed-class symbols indicate minimum writing speed. A maximum read figure and a writing-class designation describe different characteristics, so the presence of U1 and Class 10 does not turn the 120MB/s reading specification into a sustained writing result. For a buyer moving files off the card, the listed read ceiling may be relevant. For a buyer recording to it, the required writing class and the actual host need separate attention. [3], [4], [7], [5]
Moglix advertises faster app loading using the A1 rating, and A1 also appears in the listed markings. The SD Association places application-class requirements within measurements performed under conditions defined by the specification. This is more precise than treating the retailer's app-loading sentence as a timed result for a particular phone. No exact-model app benchmark was established in this refresh. If your main reason for buying is application storage, check whether the intended host supports your planned use and whether its behavior has been tested with this variant. The A1 designation is relevant evidence about the advertised class, but it does not answer how long a specific app will take to open or whether moving that app is supported by your setup. [6], [4], [1]
Check the seller's warranty and the actual bundle
Asubic lists six months of shop warranty for its Japanese parallel-import offering. That statement is useful for understanding that seller's service, but it does not establish a manufacturer warranty for a US purchase of this ASIN. The existing research also records unresolved regional warranty and accessory descriptions. Therefore, ask the seller serving your destination to confirm the warranty provider, applicable term and exact box contents before ordering. Do not substitute a warranty statement from another region or assume that a familiar Ultra package includes the same accessories. These are purchase checks with a practical consequence: the capacity and model can match while the service arrangement and bundle still require confirmation. [4], [6], [7], [1]
A conditional recommendation is the most defensible conclusion from this evidence. The listings support a 64GB UHS-I storage option with U1, Class 10 and A1 markings and a retailer-stated maximum reading speed. They leave exact-host behavior and important performance and ownership questions open. If those documented characteristics match your requirements and you can confirm the host, bundle and seller support, the variant remains a candidate to consider. If you require proven sustained speed, a timed application benefit or a verified endurance rating, this research does not establish those properties. Make the decision around the evidence that answers your actual workload, and keep unresolved requirements visible rather than replacing them with an untested expectation. [3], [4], [6], [7], [1]
What remains unresolved
The accepted evidence distinguishes the maximum read listing from an actual result and the class markings from measurements made in a particular workload. This refresh did not establish a physical benchmark for the 64GB GN6MN card, sustained writing behavior, energy efficiency or endurance. Those omissions limit the verdict rather than proving that the card performs poorly. A recording workload with a strict sustained requirement needs evidence addressing that requirement; a maximum reading specification does not supply it. Likewise, a requirement for repeated long-term writing cannot be answered by the capacity and A1 markings alone. When those properties decide the purchase, seek an exact-variant test or documentation that identifies the conditions and intended use. [4], [6], [7], [1]
The source search also encountered hands-on English reviews of other Ultra capacities and generations. Those pages were considered during research, but their numerical results were deliberately not attached to this product. That choice leaves a genuine benchmark gap while avoiding a misleading appearance of laboratory certainty. Evidence from a different card can suggest questions to investigate, yet it cannot establish this card's boot time, throughput or endurance. The manufacturer page could not be snapshotted under the publisher's robots policy, and the manufacturer setup sheet that could be read identified a different package suffix. The recorded gaps retain the attempted URLs so a later researcher can see what was checked and why the limits remain.
Buyer questions
Before you buy
What is the marketed capacity?
Moglix states 64 GB for SDSQUA4-064G-GN6MN. Usable space after formatting was not measured. [6]
Compatibility
Which interface is listed?
CLS lists UHS-I. This identifies the interface; it does not establish support for a particular device or reader. [3]
Everyday use
Is app-loading performance independently tested?
Moglix advertises A1-rated app loading. The accepted evidence has no independent benchmark that establishes the result on a particular device. [6]
Limitations
Do the advertised classes establish sustained performance?
Ryans names U1, Class 10 and A1. The evidence records a sustained-performance gap, so these markings are not presented as a measured sustained result. [4]
Is 120MB/s a measured result for this card?
No. Asubic lists a maximum reading speed of 120MB/s for the exact model. This research does not establish that result on a particular host. [7]
Care and maintenance
Does the Japanese shop warranty establish US coverage?
No. Asubic lists six months of shop warranty for its Japanese parallel import. Confirm the provider and terms for your actual seller and destination; US coverage remains unresolved. [7]
Product images
Facts and specifications
Retailer listing
| Specification | Value | Source |
|---|---|---|
| Certification | U1, Class 10, A1 BD | [4] |
| Interface | UHS-I IL | [3] |
| Sequential Read | 120 MB/s JP | [7] |
| Storage Capacity | 64 GB IN | [6] |
| Warranty | Asubic lists six months of shop warranty for its Japanese parallel import. JP | [7] |
Other facts
| Specification | Value | Source |
|---|---|---|
| Use Case | The retailer advertises A1-rated app loading. IN | [6] |
KnowSpec analysis
Match the exact card and the intended workload
The 64GB identity, UHS-I interface and U1, Class 10 and A1 markings support a conditional storage choice. Asubic lists a 120MB/s maximum read specification, while standards guidance explains why class markings and app requirements answer different questions. Choose only after checking the host and the shipment's warranty and accessories; this evidence does not establish sustained speed, app-loading time or endurance for the exact GN6MN card.
Method: Synthesis of exact-model retailer descriptions and SD Association definitions; no measured-performance inference.Visible information gaps
Missing information is shown rather than guessed.
- Topic:Limitationsconflicting
- Topic:Measured Performancenot found
- Topic:Efficiencynot found
- Topic:Sustained Performancenot found
- Topic:Warranty And Bundleconflicting
- Topic:Host And Reader Compatibilitynot found
- Topic:Endurance And Data Retentionnot found
- Source.Manufacturernot public
Sources and method
- Application Performance ClassSD Association · retrieved 2026-10-07Standards body
- Two SanDisk Ultra 128GB cards, eight years apart: the new one writes half as fastCKTechCheck · retrieved 2026-10-07Lab review
- SanDisk Ultra MicroSDXC 64GB SDSQUA4-064G-GN6MNCLS · retrieved 2026-10-02Retailer listing
- SanDisk Ultra SQUAR 64GB MicroSDXC UHS-I U1 Class 10 A1 Memory Card #SDSQUA4-064G-GN6MNRyans · retrieved 2026-10-02Retailer listing
- Speed ClassSD Association · retrieved 2026-10-07Standards body
- Sandisk 64GB MicroSDXC Memory Card, SDSQUA4-064G-GN6MNMoglix · retrieved 2026-10-02Retailer listing
- SanDisk SDSQUA4-064G-GN6MN Ultra 64GB parallel importAsubic / Toeimusen · retrieved 2026-10-07Retailer listing