Silicon Power 1TB Superior Micro SDXC UHS-I (U3) 4K A2,High Speed MicroSD Card with Adapter SU001TBSTXDA2V20AC

I bought the Silicon Power 128GB microSDXC card expecting that might have low performance or might be even fake at this price range—but running Fake Device Test proved otherwise: Average Write Speed: 39.32 MB/s Average Verify Speed: 85.38 MB/s No errors during full 124.36 GB write-and-verify sequence That tells me this card is legit, not fake. Is it hitting the advertised 80 MB/s write? No—not in my test—but the discrepancy likely reflects file handling and real-world usage rather than a counterfeit product. On my Galaxy Tab S9, video playback is smooth, apps run flawlessly, and no glitches or slowdowns so far. I'm completely satisfied with its reliability and performance in everyday use. And lets not forget that read speed is pretty close to 100MB/s. ✅ Why I like it: real-world stability, zero verification errors, works flawlessly with my galaxy Tab S9. 🔄 Room for improvement: Write speed below spec—but still enough for 4K video and app storage. Overall: a genuine, affordable, and trustworthy card for media and tablet use. ⭐ 4 Other Great Options at This Price Range But in case you want more options to choose, Here are four solid alternatives worth considering: 1. Amazon Basics Micro SDXC (A2 U3, up to 100 MB/s) A budget-friendly and highly reliable card—with IPX6 water/shock/X-ray resistance and broad compatibility. And in my experience Amazon products really deliver what they say. 2. SanDisk Ultra 128 GB (UHS‑I, up to 140 MB/s, A1) The most famous and well known brand in memory, This one offers fast read speeds and trusted brand reliability for Full HD tasks—great also for tablets and 4K use. 3. Samsung EVO Select 128 GB (UHS‑I U3 V30, up to 160 MB/s, A2) Probably the best brand in memory, High endurance and blazing read/write speeds—ideal for demanding mobile, tablet, or Nintendo Switch users. 4. PNY Elite‑X 128 GB (Class 10, U3 V30, A1) This brand is well known for it's competitive performance while maintaining the price. Fast and dependable, with consistent read/write performance—excellent for 4K media and app storage. 📝 Final Thoughts Silicon Power: Verified real, performed well in tests, smooth real-world use—especially for video and apps. Alternatives: Amazon Basics offers great durability and price-value; SanDisk and Samsung bring top-tier brand trust and higher speed; PNY delivers solid mid‑range reliability. If you’re price-sensitive but want peace of mind, Silicon Power is a legit pick. If speed or brand reputation matters more to you, one of the other four might serve better depending on your device.

This SDXC card is an excellent choice for anyone who needs dependable local storage. It provides plenty of extra space for smartphones or tablets, making it easy to store a large collection of videos, photos, and music — perfect for those who prefer not to rely on an internet connection. The card comes pre-formatted in the ExFAT file system, which works well with most modern devices. Just note that if your device requires a different format (for example, even new Fire tablets need FAT32 for a “combined” internal storage mode), you may need to reformat it. Performance-wise, it’s noticeably fast and handles large files and high-definition videos without any issues. Overall, a reliable, affordable (price-wise), and practical option for expanding storage on phones or tablets compatible with the SDXC cards. Highly recommended!

I absolutely love these cards. I collect retro gaming handheld devices and they each require a new card because the ones they initially come with are very bad and corrupt almost immediately. I have these cars on my Switch, Steam Deck Oled, Trimui Brick, R36S, Nintendo DSI XL, PSP 2001, Anbernic 406H, Anbernic 405M, Anbernic RG 40v, and Trimui Smart Pro. They work wonderfully fast and have never failed, not even once. I highly recommend this brand above all others not just for its affordability but their reliability. You can’t go wrong with these! Why did you pick this product vs others?: Because of price and reliability. Transfer speed: They are fast. Storage capacity: Ample room to add as many ROMS I own for my dedicated devices. Design: It’a the same as the other cards. Card quality: Some of the highest quality micro SD cards you’ll find.

Reliable and High-Performance MicroSD Card – Perfect for 4K Recording and Gaming I recently upgraded to the Silicon Power 128GB Superior Micro SDXC UHS-I (U3), V30, 4K A2 memory card, and it has significantly enhanced my device's performance. Whether you're using it for 4K video recording, gaming, or expanding storage on devices like the Nintendo Switch, this card delivers exceptional results. Key Features: High-Speed Performance: With read speeds up to 100MB/s and write speeds up to 80MB/s, it ensures smooth 4K video recording and quick file transfers. A2 App Performance: The A2 rating guarantees faster app launch and smoother multitasking. V30 Video Speed Class: Supports Video Speed Class 30 for uninterrupted 4K Ultra HD videos and burst mode shots. Durability: Built to withstand various conditions including waterproof, dustproof, temperature-proof, and X-ray-proof, making it reliable in tough environments. Versatile Compatibility: Works with smartphones, tablets, drones, action cameras, and gaming consoles like the Nintendo Switch. Since installing this card, my device has experienced faster load times, smoother gameplay, and reliable 4K video recording. It’s a cost-effective solution for those seeking high performance without breaking the bank.

SEEMS to be working GREAT but as with all of these you don't get the full labeled capacity.

Good quality and works as expected

Would give 6 stars if I could. I purchased another brands SD card first. Thought it would be fine as I've used their products before with no issue. Popped it in my steam deck and spent the next 3 days dealing with drop outs and other issue. It would just stop responding. Returned it and purchased this instead and couldn't be happier. Immediately recognized and quickly formated. Transfered 120gb of data right out the gate with zero issues. Highly recommend, silicon power never fails to impress

I use this card on my Steam Deck and it works perfectly. The full 1TB capacity is recognized right away, and the read/write speeds are fast enough for large game installs and smooth gameplay. Load times feel quick, and I can run big titles directly from the card without any issues. The A2 rating really helps with app performance, and the U3/V30 speed class is good for handling large files and updates. I notice no stutter or lag even with AAA games. The card also stays stable and doesn’t overheat during long gaming sessions. For the price, this is one of the best values for expanding Steam Deck storage. Reliable, fast, and plenty of space for a big game library.