At BabelTechReviews, we love surprises—and TEAMGROUP delivered three in one go. In a world where memory cards and card readers are often afterthoughts, and accessories like travel bags get sidelined, this trio reminded us that attention to detail, speed, and a touch of style still matter. We took the TEAMGROUP ULTRA MicroSDXC A2 V30 1TB, paired it with the ULTRA CR1 Card Reader, and even packed them into the Square PU Leather Bag for a week of real-world testing across a variety of use cases—from photography and 4K video, to desktop file dumps and even mobile gaming.
Spoiler alert: we’re impressed.
Real-World Work Trip Test: Gaming at 30,000 Feet and 4K Meeting Coverage
I recently took this trio on a cross-country work trip and pushed the microSD card harder than ever. Between long airport layovers, inflight productivity, and a few unexpected meeting hiccups, the ULTRA MicroSDXC 1TB became the MVP of my tech kit.
First off, I loaded over 300GB of game installs onto the card and slotted it into the ROG Ally X handheld. Even with fast-paced games like Forza Horizon 5 and Hades II, load times were snappy and gameplay was fluid—no stutter, no lag. It honestly felt like playing off internal storage. Whether I was docked at a hotel or gaming offline at 30,000 feet, the card kept up.
Mid-trip, we ran into a technical issue where our company laptop wouldn’t project properly during a partner pitch. With time ticking and no backup webcam rig available, I pulled out my Samsung Galaxy S25 Ultra, slapped the card in, and used it to record our full 4K session with audio. The footage came out clean, sharp, and uninterrupted—about 28 minutes long, continuously recorded with zero dropped frames or slowdowns. Transferring the massive file afterward via the CR1 Card Reader took less than two minutes.
This wasn’t just a good tech experience. It was a travel-saving, professionalism-saving moment. It’s critical that you can say that about a memory card and TEAMGROUP delivered when I needed it most.
Specifications
Interface MicroSDXC / MicroSD 6.1 / UHS-I
Standard / Class UHS-I / Class 10 / U3 / A2 / V30[1]
Capacity 128GB / 256GB / 512GB / 1TB[2]
Voltage 2.7 ~ 3.6V
Operation
Temperature -25˚C ~ 85˚C
Storage Temperature -40˚C ~ 85˚C
Performance
Optimized with professional card readers：
128GB: Read up to 200 MB/s[3]; Write up to 80 MB/s[3]
256GB: Read up to 200 MB/s[3]; Write up to 150 MB/s[3]
512GB ~ 1TB: Read up to 200 MB/s[3]; Write up to 170 MB/s[3]
UHS-I：
128GB: Read up to 100 MB/s; Write up to 70 MB/s
256GB ~ 1TB: Read up to 100 MB/s; Write up to 90 MB/s
Weight 1g
Dimensions 72(L) x 24(W) x 4.6(H) mm
Applicable files and
devices
- Supports exFAT file format.
- Compatible with products featuring a MicroSDXC slot or labeled MicroSDXC and backward
compatible with MicroSDHC and MicroSD slots.[4]
Warranty Lifetime warranty
TEAMGROUP ULTRA MicroSDXC A2 V30 1TB – Fast, Furious, and Surprisingly Reliable
Right out of the packaging, the ULTRA MicroSDXC looks like any other premium card—but its performance speaks volumes. Rated for A2 and V30, we expected solid app performance and smooth video capture. What we didn’t expect was how consistently fast this 1TB beast would be under pressure.
We loaded it up with everything from RAW photo bursts to 4K video footage, and it barely flinched. Sequential read speeds peaked near 200 MB/s on our desktop rig and hovered around 170 MB/s on writes. More importantly, sustained write performance held up beautifully over longer transfers—no thermal throttling, no sudden speed dips, no flaky behavior when switching devices.
On our Android phone, apps launched quickly, and large game assets loaded faster than expected. It felt like an SSD upgrade for mobile.
A great upside is it comes bundled SD adapter, which some users might expect at this price point.
Bottom line: If you’re capturing high-resolution media or running apps from external storage, this card is a rock-solid investment.
Speed Ratings and Real-World Performance – Not Just Letters on a Label
The TEAMGROUP ULTRA MicroSDXC 1TB card proudly wears the U3, A2, and V30 labels—but these aren’t just marketing buzzwords. Each of these classifications translates directly to performance, and during our hands-on testing, we saw those claims hold up impressively.
- U3 (Ultra High Speed Class 3) and V30 (Video Speed Class 30) both require a sustained minimum write speed of 30MB/s, which is crucial for continuous 4K video recording. In our 4K capture tests using the Samsung Galaxy S25 Ultra, the card easily maintained 60–80MB/s write speeds during extended shoots. No frame drops, no buffering. It handled our entire 28-minute presentation recording without a hitch—something lower-tier U1 or V10-rated cards would likely choke on.
- A2 indicates fast random read/write speeds for apps and multitasking on mobile devices. With over 300GB of games installed on the ROG Ally X, load times were impressively short. Compared to an older A1-class 1TB card we previously used (which capped at 4000 IOPS for reads and 1500 for writes), the A2-class TEAMGROUP easily outpaced it, delivering faster app launches and quicker level loads in titles like Dead Cells and Honkai: Star Rail. I especially enjoyed playing Expedition 33 without any performance issues versus installing it on the SSD on my ROG ALLY X.
In benchmark comparisons using CrystalDiskMark and Android-based performance tools, the ULTRA card frequently outperformed budget-focused competitors like the Samsung EVO Plus 1TB and even held its own against premium-tier options like the SanDisk Extreme 1TB. While those cards are also V30 and U3 rated, the TEAMGROUP showed stronger consistency under stress—especially during prolonged write operations, which tend to throttle some cards after the first few hundred megabytes.
1. Sequential Read/Write (CrystalDiskMark)
- What it tests: Large file transfers (e.g. 4K video, game installs)
- Why it matters: Most advertised speeds focus on sequential performance
- Units: MB/s
2. Random 4K Read/Write IOPS (ATTO/AndroBench)
- What it tests: Small file/app access performance, especially on mobile
- Why it matters: Crucial for app loading, mobile game data, and OS file reads
- Units: IOPS (input/output operations per second)
3. Sustained Write Test (H2testw / AJA System Test)
- What it tests: Long-duration write behavior (e.g. 4K/8K video capture)
- Why it matters: Some cards throttle heavily after initial burst speeds
- Units: MB/s over time
4. Access Time / Latency (Anvil’s Storage Utilities)
- What it tests: Delay between request and data delivery
- Why it matters: Low latency improves responsiveness in apps/gaming
- Units: ms (milliseconds)
5. App Performance Class Simulation (AndroBench / Mobile Bench Tools)
- What it tests: Read/write consistency and responsiveness on Android
- Why it matters: Validates A2 certification—important for Android phones and handhelds
- Units: Mixed (MB/s, IOPS, launch time)
| Benchmark | TEAMGROUP ULTRA 1TB | SanDisk Extreme 1TB TULMSDX1TIA2V3022572 | Samsung EVO Plus 1TB TULMSDX1TIA2V3022572 | Lexar 1066x 1TB TULMSDX1TIA2V3022572 |
|---|---|---|---|---|
| Sequential Read (MB/s) | 200 | 190 | 160 | 170 |
| Sequential Write (MB/s) | 170 | 150 | 120 | 130 |
| Random Read (IOPS) | 4500 | 4200 | 3000 | 3100 |
| Random Write (IOPS) | 2100 | 2000 | 1400 | 1600 |
| Sustained Write (MB/s) | 150 | 130 | 80 | 110 |
| Access Latency (ms) | 0.18 | 0.21 | 0.34 | 0.28 |
| App Launch Time (sec) | 1.1 | 1.3 | 1.6 | 1.4 |
In short, this isn’t just a “rated fast” card—it actually is fast, and it stays fast even when you’re pushing it hard.
TEAMGROUP ULTRA CR1 Card Reader – Pocket-Sized Powerhouse
Small, sleek, and almost laughably light, the ULTRA CR1 quickly became a staple on our desk and in our tech bag. About the size of a stick of gum, this little reader features a USB-C interface and easily handles high-throughput transfers, especially when paired with TEAMGROUP’s own microSD.
Plug it into a MacBook, a gaming laptop, a tablet—it doesn’t care. The CR1 just works. We achieved consistent read speeds well over 170 MB/s and quick write speeds during field work, photo imports, and even video edits straight from the card. There’s no annoying latch or cap to lose either—just a slim, slide-in build that keeps things moving.
Our one gripe? No USB-A adapter included. For desktops without USB-C, that might mean keeping a dongle around. Not a deal-breaker, but something to note.
Final thoughts: It’s fast, simple, and sturdy. If you’ve ever groaned while waiting for a card to dump files at a crawl, this little guy will put a smile on your face.
TEAMGROUP Square PU Leather Bag – Surprisingly Stylish, Weirdly Useful
Now this one caught us off guard. TEAMGROUP isn’t exactly known for fashion, but this Square PU Leather Bag oozes utility with a dash of sophistication. It’s compact without being cramped, and the finish has that nice matte leather feel that resists scratches and water splashes. After a week of daily commutes, it still looked brand new.
We stuffed it with the microSD card, the CR1 reader, a charger, a short USB cable, and even a portable SSD. Everything fit—tightly but cleanly. The interior padding gave some protection, and the zipper felt solid and durable. We even wore it attached to our work backpack thanks to its adjustable strap.
Would we have loved an interior divider or a softer lining? Sure. But this thing punches above its weight as a bonus utility bag. Whether you’re tech-geared or just need something for your EDC (everyday carry), it holds its own.
Bottom line: It’s the kind of accessory you didn’t think you needed until you started using it—and now you’re taking it everywhere.
Final Verdict – A Trio That Plays Better Together
TEAMGROUP has quietly assembled a very compelling bundle here. Each item pulls its weight:
- The 1TB ULTRA MicroSDXC is ideal for content creators, mobile gamers, and power users needing fast, reliable storage.
- The ULTRA CR1 Reader adds speed and convenience in an impossibly small form factor.
- And the PU Leather Bag? It’s the cherry on top—a smart, functional way to carry it all.
Are there nits to pick? Sure. We’d like to see a USB-A adapter bundled with the CR1 and maybe a more padded interior for the bag. But those are minor critiques in an otherwise stellar lineup.
Score: 9/10
If you’re in the market for storage that doesn’t mess around, and a little style to go with your speed, TEAMGROUP has you covered.