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The Lexar Blue Series 633x is a 128GB microSDXC card rated UHS-I U3, with reads up to 100 MB/s and writes around 45 MB/s. It is a budget-friendly card for phones, tablets, dash cams and 1080p action cameras, where its U3 rating covers steady video recording. It is slower on writes than the SanDisk Extreme and Samsung EVO Plus lines, so it is not the pick for 4K60 or burst shooting on high-end cameras. Owners treat it as a dependable everyday card rather than a fast one.
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Lowest price we've seen: $45.98 on Nov 9 at Newegg. Tracked across 1 store since Nov 9.
Owners describe the Blue Series 633x as a reliable, inexpensive card that does everyday jobs well. Most praise its capacity and steady performance in phones, dash cams and 1080p cameras; faster cards are recommended for 4K and burst shooting.
