SanDisk
SanDisk 128_TF_Ultra_R6 128GB Micro SD Card + Reader
★★★★★
A1-rated A1 performance and 100MB/s reads in a 128GB microSDXC card mean this SanDisk bundle keeps your Android device's storage fast and full-featured.
$17.54*
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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.
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Overview
Key Features
Bundle with (1) 128GB SanDisk microSD card and (1) Everything But Stromboli Multi-Slot Card Reader - Includes SD, Micro SD (TF), M2, and MS slots for easy transfer
Compatible with any LG Phone with microSDHC or microSDXC port such as LG K51, LG Q70, LG Q7+, LG Stylo 5+ and many other LG Phones (check device manual for exact compatibility)
Read speeds up to 100mb/s; rated A1 for app performance and UHS Speed Class U1 and Speed Class 10 for Full HD video recording and playback
Shockproof, temperature-proof, waterproof, and X-ray-proof
Ideal for Android-based smartphones and tablets for more expandable storage
Specifications
Capacity
128GB
Card Type
microSDXC
Speed Class
UHS-I, Class 10, A1
Read Speed
Up to 100MB/s
Durability
Shockproof, waterproof, temperature-proof, X-ray-proof
Compatibility
Android smartphones and tablets with microSDXC slots
Bundle Includes
128GB SanDisk Ultra microSD card + Everything But Stromboli multi-slot card reader (SD, microSD, M2, MS)
Pros & Cons
👍 Pros
- Up to 100MB/s read speed enables fast photo loading and smooth Full HD video playback directly from the card on compatible devices.
- A1 app performance rating ensures apps installed on the card load with sufficient IOPS to behave responsively rather than sluggishly.
- Shockproof, waterproof, temperature-proof, and X-ray-proof construction protects stored data through everyday carry hazards.
- Bundled multi-slot card reader adds immediate USB file transfer capability without requiring the host device to serve as the transfer bridge.
- 128GB capacity provides substantial photo, video, and app storage expansion for Android devices with limited internal storage.
👎 Cons
- Write speeds are not rated to U3 or V30 — sustained 4K video recording or burst RAW shooting may cause buffer stalls on capable cameras and devices.
- The bundled card reader's USB protocol and transfer speed are unspecified — worst case, a USB 2.0 reader would bottleneck the card's 100MB/s potential to ~40MB/s in PC transfers.
- A1 app performance class is the minimum rating tier — devices running storage-intensive applications benefit more noticeably from A2-rated cards.
- The 128GB capacity in microSDXC format requires SDXC slot compatibility — devices with older SDHC-only slots (limited to 32GB max) cannot use this card.
- This is not a UHS-II card — maximum interface throughput is capped at UHS-I's ~104MB/s theoretical ceiling, leaving no headroom for future higher-speed devices.
Frequently Asked Questions
What read speed does this SanDisk 128GB microSD card deliver, and what does that mean for everyday use?
Rated read speeds reach up to 100MB/s — classified as UHS-I (Ultra High Speed Phase I) with U1 speed class. In practice, this means fast photo and app loading, smooth Full HD video playback, and quick file transfers to a PC when using the included card reader. Write speeds are not rated to the same level — burst-write-intensive tasks like continuous 4K video recording may exceed the card's sustained write throughput.
What does the A1 rating on this card indicate?
A1 (Application Performance Class 1) certifies the card meets minimum random read/write IOPS thresholds for running apps directly from the card: 1500 random reads and 500 random writes per second. On Android devices, this means apps stored on the card respond more like internal storage than a passive data card — a meaningful usability distinction on devices with limited internal storage.
What is the Everything But Stromboli card reader included in this bundle, and which formats does it support?
The bundled multi-slot reader accepts SD, microSD (TF), M2, and MS (Memory Stick) formats. It connects via USB-A and enables direct card-to-PC file transfer without needing the phone or tablet as an intermediary — helpful for photo backup workflows. USB protocol and speed are not published, but the read bottleneck will be the card's 100MB/s rating, not the reader.
Is this card compatible with my device? It says "LG phones" in the listing.
While the listing specifically mentions LG K51, Q70, Q7+, and Stylo 5+ examples, any Android smartphone or tablet with a microSDHC or microSDXC slot will work. The card follows the universal microSD form factor and speed class standards — it is not electronically LG-exclusive. Confirm your device accepts microSDXC (128GB requires SDXC, not SDHC) via your device's manual.
Is this card waterproof and protected against physical damage in everyday carry scenarios?
Yes — the card is rated shockproof, temperature-proof, waterproof, and X-ray-proof per SanDisk's standard durability specifications. These ratings cover the physical card only, not the bundled reader. In practical terms, this means accidental drops, washing-machine incidents, and airport security X-ray scanners will not damage the card or its stored data.
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