Review: TEAMGROUP ULTRA MicroSDXC A2 V30 Memory Card

Today, we are looking at the TEAMGROUP ULTRA microSDXC (A2, V30, U3) in its 1TB flavor for our review. We put it through three real-world use cases:

Steam Deck OLED game storage
Sony ZV-E10 4K capture.
PC throughput via a USB-C reader

TEAMGROUP also sent over their ULTRA CR-I Type-C card reader, which we used for our PC benchmarks.

On paper, this 1TB card claims up to 200 MB/s reads and 170 MB/s writes (with a fast, “pro” reader), carries A2 app performance for snappier random I/O, and is rated V30 for 4K recording. Big capacity, speedy enough for handheld gaming, and compliant with 4K capture.

Price

As of writing this review, the 1TB on Amazon costs around $68.99, which is cheaper than a SanDisk 1TB Extreme microSDXC, which typically sits around $90, and the same price as the Samsung EVO Select microSD, around $67.49.

Box & Technical Specifications

What’s in the pack

ULTRA microSDXC 1TB

Specs:

Standards: UHS-I, U3, A2, V30 (4K-ready)
Speeds (with a fast reader): up to 200 MB/s read / 170 MB/s write (TEAMGROUP internal testing)
Speeds (typical UHS-I devices): up to 100 MB/s read / 90 MB/s write for the 1TB tier (that’s the Steam Deck ceiling)
Durability & warranty: water/shock/X-ray/temperature resistance, lifetime warranty on the card

Test Bench & Method

Reader (PC tests): TEAMGROUP ULTRA CR-I USB-C microSD reader
Software: CrystalDiskMark 8.0.4 (Admin), 1 GiB, 5 runs, default profile
Steam Deck: microSD slot (UHS-I)
Camera: Sony ZV-E10, 4K/30p, 100 Mbps (XAVC S)

Benchmarks

PC (CrystalDiskMark, ULTRA CR-I reader)

SEQ1M Q8T1: 167.55 MB/s read, 145.21 MB/s write
SEQ1M Q1T1: 167.35 MB/s read, 145.16 MB/s write
RND4K Q32T1: 10.69 MB/s read, 4.71 MB/s write
- ≈ ~2,740 read IOPS / ~1,206 write IOPS
RND4K Q1T1: 10.37 MB/s read, 4.68 MB/s write
- ≈ ~2,655 read IOPS / ~1,198 write IOPS

These are exactly what we expect from a good UHS-I card and a fast USB-C reader. Sequential numbers are right below the typical ~180/160 MB/s ceiling, with random 4K performance that lines up with A2-class behavior over USB.

Steam Deck OLED (Game storage)

The Deck’s slot is UHS-I-limited, sequential throughput tops out around ~100 MB/s, so absolute speed is capped by the Deck itself. In practice, the ULTRA feels as fast as a good UHS-I card can be on the Deck, but the difference is consistency. Installs and first loads were steady with no weird dips or stalls. Smooth library installs, shader cache building, and reliable level loads, with 1TB of storage headroom.

Sony ZV-E10 (4K video)

Tested at 4K/30p, 100 Mbps (XAVC S)
No dropped frames, no buffer warnings, and clip integrity was perfect across multiple takes. If you’re shooting the ZV-E10’s standard 4K profile, V30 is the correct class, and this card handled it cleanly.

About the ULTRA CR-I Reader (the one we used for pc testing)

Tiny Type-C reader, plug-and-play on desktop and phones/tablets. TEAMGROUP rates it up to 180 MB/s read / 160 MB/s write with their cards, with a UHS-I slot internally. In our testing, it behaved as advertised and didn’t thermal throttle during longer transfers. Warranty is 1 year for the reader. If you’re moving a lot of footage or big Steam backups between machines, a decent reader like this works wonders.

The Good

1TB capacity: plenty for a big Deck library or long shoot days
Strong sequential throughput with a fast reader
Consistent behavior on the Deck and ZV-E109, no odd slowdowns during installs/loads, and no buffer warnings and dropped frames.

The Not-So-Good

UHS-I ceiling still applies on most devices (including the Deck)
Not meant for V60/V90 workflows (high-bitrate/all-I codecs on higher-end bodies)

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Final Verdict

For a single card that covers Steam Deck storage and ZV-E10 4K/30 100 Mbps without any drama, the TEAMGROUP ULTRA A2 V30 (1TB) nails it. On PC, it posted ~168 MB/s read / ~145 MB/s write, on the Deck, it delivered as fast as UHS-I allows with notably consistent performance, and on the ZV-E10 it recorded 4K/30 100 Mbps with zero dropped frames or buffering. If you don’t need V60/V90 for professional video codecs, this is an easy recommendation, and at $68.99, it’s a steal. Highly recommended.

Final Score: 9.5/10