Best SD Cards For Sony Walkman NW-ZX707
Expert recommendations based on Astell&Kern A&norma SR35 specifications
Recommended Spec
microSD / microSDXC (Class 10 or faster)
The Astell&Kern SR35 has 64GB built in and takes microSD cards for larger hi-res libraries. A name-brand card of 256GB or more suits DSD and FLAC collections.
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#1 Top Pick for Astell&Kern A&norma SR35
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Official Astell&Kern A&norma SR35 SD Card Requirements
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Format: microSD / microSDXC
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Minimum Speed: Class 10 (10 MB/s write)
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App Performance: A1 (Required for OS/Apps)
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Maximum Capacity: Up to 1TB (Official), 2TB (Tested)
Why these requirements? The SR35 is the entry-level premium player from Astell&Kern. It features Quad DACs and a unique tilted screen. While it has 64GB internal storage, the high-res files (DSD/MQA) it is designed to play require massive storage. A reliable name-brand card is essential for the custom UI stability.
Detailed Specifications
Type
microSD / microSDXC
Min Speed Class
Class 10
Write Speed
10 MB/s
Recommended Size
256GB, 512GB, 1TB
Max Capacity
1TB (Official), 2TB (Tested)
Top SD Card Recommendations
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| SD Card | Verified | Speed Class | Write Speed | Pros | Price |
|---|---|---|---|---|---|
SanDisk Extreme microSD
Full Review
|
V30 | Up to 130 MB/s |
|
$ Check Price | |
Lexar Professional Silver (1066x)
Full Review
|
V30 | Up to 120 MB/s |
|
$ Check Price |
Compare These Cards
Open in full compare toolSee how the recommended cards for Astell&Kern A&norma SR35 stack up side by side, or swap in any other card.
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SanDisk Extreme microSD
$ · Mid-Range- UHS RatingUHS-I
- Speed ClassV30
- App PerformanceA2
- Read SpeedUp to 190 MB/s
- Write SpeedUp to 130 MB/s
- EnduranceStandard
Available Capacities32GB, 64GB, 128GB, 256GB, 512GB, 1024GB, 1500GB
Pros
- V30 and A2 with fast writes
- sold up to 1.5TB. Widely available
- so easy to buy genuine.
Cons
- Write speeds are lower on the 32GB and 64GB versions.
recommended
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Lexar Professional Silver (1066x)
$ · Mid-Range- UHS RatingUHS-I
- Speed ClassV30
- App PerformanceA2
- Read SpeedUp to 160 MB/s
- Write SpeedUp to 120 MB/s
- EnduranceStandard
Available Capacities64GB, 128GB, 256GB, 512GB
Pros
- V30 card with 120 MB/s writes at a mid-range price.
Cons
- Needs a Lexar reader for the full 160 MB/s read speed.
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SanDisk Extreme microSD
The SanDisk Extreme microSD pairs V30 video speed with an A2 app rating and reads up to 190 MB/s. It covers 4K recording in drones and action cameras, game storage in handhelds, and app storage in phones. It is sold from 32GB to 1.5TB.
Target User:
Smartphone, drone, and action camera users who want one reliable card for both 4K video and app storage
Best For:
Action Cameras, Drones, Smartphones & Tablets, Mirrorless Cameras
Step up to the SanDisk Extreme PRO for higher sustained write speeds, or down to the Samsung EVO Select if 4K recording isn't a priority and price matters more.
Lexar Professional Silver (1066x)
The Lexar Professional Silver (1066x) microSD card offers excellent read and write performance at a mid-range price point making it a great value for vloggers, photographers, and gamers.
Target User:
Content creators, photographers, and gamers
Best For:
Action Cameras, Mirrorless Cameras, Smartphones & Tablets
Consider this card over others when you need high-speed V30 performance without breaking the bank.
Featured Products on Amazon
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Kingston Canvas Go Plus 128GB microSD Card | Up to 200MB/s | Class 10, UHS-I, U3, V30, A2 | SDCG4/128GB
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Kingston 128GB Canvas Select Plus microSD Card | Up to 150MB/s | Class 10, UHS-I, U1, V10, A1 | SDCS3/128GB
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Frequently Asked Questions
What SD Card Do I Need for Astell&Kern A&norma SR35?
The Astell&Kern A&norma SR35 takes a microSD / microSDXC card rated Class 10 or faster. 256GB or 512GB or 1TB covers most owners, and the maximum is 1TB (Official), 2TB (Tested). Buy SanDisk, Lexar, Samsung or Kingston from a reputable seller: counterfeit cards are the most common cause of lost files.
Does the SR35 run Android?
It runs a heavily modified, closed version of Android. You cannot install the Play Store, but it supports whitelisted streaming apps (Tidal, Spotify, etc.). An A1 or A2 card is recommended for best app performance.
Is Class 10 required for Astell&Kern A&norma SR35?
Yes. Class 10 guarantees 10 MB/s of sustained write, which keeps the Astell&Kern A&norma SR35 free of slow loads, stutter, or write errors. For load times, the A1 app rating matters more.
What size SD card should I get for Astell&Kern A&norma SR35?
256GB covers light use; 1TB suits heavy use. The maximum is 1TB (Official), 2TB (Tested).
Can I use older or slower cards with Astell&Kern A&norma SR35?
Not below Class 10. Slower cards cause slow loads, stutter, or write errors. Check the card label for the Class 10 mark.
Does the brand matter for Astell&Kern A&norma SR35?
Yes. SanDisk, Lexar, Samsung and Kingston cards meet their rated speeds. Buy from the brand's store or a major retailer: counterfeit cards sold under those names are common on marketplaces.
What happens if I use the wrong card with Astell&Kern A&norma SR35?
A card slower than Class 10 causes slow loads, stutter, or write errors. A card over the maximum capacity or in the wrong format may not be recognized.
How long will an SD card last in Astell&Kern A&norma SR35?
Several years in normal use. Cards usually fail from wear or counterfeit flash, not age. Replace yours at the first write error, corrupted file or "card not recognized" message.