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Amazon.com: PNY 32GB Elite Class 10 U1 microSDHC Flash Memory Card 3-Pack & 64GB Elite-X Class 10 U3 V30 microSDXC Flash Memory Card 3-Pack - 100MB/s, Class 10, U3, V30, A1, 4K
![PNY 512GB PRO Elite Class 10 U3 V30 microSDXC Flash Memory Card - 100MB/s, A2, 4K UHD, Full HD, UHS-I, micro SD - Walmart.com PNY 512GB PRO Elite Class 10 U3 V30 microSDXC Flash Memory Card - 100MB/s, A2, 4K UHD, Full HD, UHS-I, micro SD - Walmart.com](https://i5.walmartimages.com/seo/PNY-512GB-PRO-Elite-Class-10-U3-V30-microSDXC-Flash-Memory-Card-100MB-s-A2-4K-UHD-Full-HD-UHS-I-micro-SD_d576a6f8-0929-4ea7-b651-14bf355c2b8d.5235e72152d71c585b370ebb28d67ca9.jpeg)
PNY 512GB PRO Elite Class 10 U3 V30 microSDXC Flash Memory Card - 100MB/s, A2, 4K UHD, Full HD, UHS-I, micro SD - Walmart.com
![Lexar Micro SD 128GB 32GB 64GB 256GB 512GB Micro SD Card SD/TF Flash Card U1 U3 4K V10 V30 Memory Card microSD for Phone TF633X - AliExpress Lexar Micro SD 128GB 32GB 64GB 256GB 512GB Micro SD Card SD/TF Flash Card U1 U3 4K V10 V30 Memory Card microSD for Phone TF633X - AliExpress](https://ae01.alicdn.com/kf/S0cb823f9a3b94ad79f0a979f94a4f8f0w/Lexar-Micro-SD-128GB-32GB-64GB-256GB-512GB-Micro-SD-Card-SD-TF-Flash-Card-U1.jpg)
Lexar Micro SD 128GB 32GB 64GB 256GB 512GB Micro SD Card SD/TF Flash Card U1 U3 4K V10 V30 Memory Card microSD for Phone TF633X - AliExpress
What is the difference between 'U1' and 'U3' on SD cards and other storage devices like thumb drives? - Quora
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