SanDisk
SanDisk 64_TF_Ultra_R6 Ultra 64GB Micro SD Card for LG
★★★★★
100MB/s reads, A1 app performance rating, and quad-proof durability make this 64GB SanDisk microSD the no-compromise storage expansion for LG Android devices.
$11.29*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.
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Overview
Key Features
Bundle with (1) 64GB 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
64GB
Read Speed
Up to 100MB/s
Speed Class
A1, UHS Speed Class U1, Speed Class 10
Interface
UHS-I microSDXC
Durability
Waterproof (IPX7), Shockproof, Temperature-Proof, X-Ray-Proof
Compatibility
LG K51, LG Q70, LG Q7+, LG Stylo 5+, and microSDHC/SDXC devices
Included
Everything But Stromboli Multi-Slot Card Reader (SD, microSD, M2, MS)
Pros & Cons
👍 Pros
- 100MB/s sequential read speed enables fast file transfers from the card to a laptop via the included card reader, covering large photo and video file offloads efficiently.
- A1 app performance certification guarantees minimum 1500 IOPS random read — apps stored on this card launch at acceptable speeds on compatible LG devices rather than at the sluggish rates of unrated cards.
- Quad-proof durability (waterproof IPX7, shockproof, temperature-proof, X-ray-proof) means the card survives typical everyday carry hazards without data loss risk.
- Bundle includes a multi-slot card reader supporting SD, microSD, M2, and MS formats, providing immediate transfer capability without a separate accessory purchase.
- UHS-I interface and Speed Class 10 rating ensures compatibility with the full range of LG microSDHC/SDXC devices listed, including LG K51, Q70, Q7+, and Stylo 5+.
👎 Cons
- U1 speed class specifies only 10MB/s minimum sustained write — insufficient for reliable 4K video recording on LG devices capable of 4K capture; U3 cards are required for that workload.
- Real-world sequential write speeds (typically 10–30MB/s for U1 cards) are significantly slower than the 100MB/s read spec, creating an asymmetric performance profile that affects video recording more than file reading.
- The included card reader's USB interface generation is unspecified — if USB 2.0, real-world transfer speeds cap at approximately 60MB/s, partially negating the card's 100MB/s read rating.
- 64GB capacity fills quickly on modern LG devices that record high-bitrate video — users capturing sustained video sessions will find the storage ceiling reached faster than expected.
- Compatibility list focuses on specific LG models (K51, Q70, Q7+, Stylo 5+) — while broadly compatible with microSDXC-capable devices, users with other smartphones should verify their device's supported storage class.
Frequently Asked Questions
What does the A1 app performance rating mean for day-to-day use on an LG phone?
A1 is the Application Performance Class 1 specification, which mandates minimum random read performance of 1500 IOPS and random write of 500 IOPS. For an LG phone running apps directly from the microSD card (App2SD), A1 ensures applications launch at acceptable speeds without the hesitation associated with non-rated cards. Cards without an A-class rating can cause apps stored on external storage to load noticeably slower than from internal flash.
What is the real-world write speed of this card, and does it match the 100MB/s read spec?
The 100MB/s spec refers to sequential read speed — the card is rated UHS-I (U1), which specifies a minimum sustained write speed of 10MB/s. Sequential write speeds for this card tier typically land in the 10–30MB/s range under real-world conditions, which is the bottleneck for recording continuous Full HD video. The read speed is significantly faster than write, which is the standard characteristic of this UHS-I U1 class.
Does this card support 4K video recording, or is it limited to 1080p?
This card is rated UHS Speed Class U1 and Speed Class 10, both of which certify a minimum 10MB/s sustained write speed — sufficient for Full HD (1080p) video recording. 4K recording typically requires UHS Speed Class U3 (minimum 30MB/s sustained write). On LG phones that can record 4K, this card may drop frames or produce corrupted footage under sustained 4K bitrates.
The bundle includes an Everything But Stromboli multi-slot card reader — does this reader support USB 3.0 speeds?
The included Everything But Stromboli multi-slot card reader supports SD, microSD (TF), M2, and MS card formats. Transfer speed through the reader depends on the reader's USB interface version — confirm the reader's USB specification to determine whether it will saturate the card's 100MB/s read speed or be limited by a USB 2.0 connection ceiling of approximately 60MB/s real-world.
Is this card rated for waterproof and shockproof conditions, and does that cover submersion?
SanDisk specifies this card as waterproof (IPX7 — submersible to 1 meter for 30 minutes), shockproof, temperature-proof, and X-ray-proof. These ratings mean the card survives incidental exposure to water (dropped in a sink, caught in rain) and the vibration/shock of normal daily carry. It is not rated for sustained deep-water submersion beyond the IPX7 spec.
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