The Lexar Professional 633x 128GB is the honest workhorse SD card: UHS-I with reads up to 95MB/s and a U3/V30 rating that sustains Full HD and 4K-capable capture — at a price that makes it the card you buy several of. For everyday cameras, this is the sensible default.
Reliable
U3 / V30 sustained write
The 30MB/s sustained floor handles Full HD comfortably and standard 4K bitrates — the everyday shooting range where most cameras actually live.
Honest speed
Up to 95MB/s read
UHS-I’s practical working speed: card-to-laptop offloads of a weekend’s shooting in minutes, no exotic reader required.
Value
The multi-card strategy
At this price, serious shooters buy two or three: one in the camera, one offloading, one spare. Cards are consumables — the 633x makes that strategy affordable.
Right choice if you…
✔ Shoot photos and Full HD/4K video on everyday cameras
✔ Want a dependable second and third card
✔ Use a camera with UHS-I slots (most consumer bodies)
✔ 128GB: thousands of RAW photos or hours of HD video
Consider something else if…
✖ You shoot professional 4K/burst work — the 1667x UHS-II V60 is built for that
✖ You need microSD — see the Lexar 1066x microSD
✖ It’s for a dashcam — endurance cards suit loop recording better
Lexar Professional 633x 128GB — Technical Specifications
| Brand | Lexar |
| Capacity | 128GB |
| Type | SDXC UHS-I |
| Read speed | Up to 95MB/s |
| Ratings | C10 · U3 · V30 |
| Use case | Everyday photography, Full HD/4K video |
| MPN | LSD128CB633 (series) |
| EAN / GTIN | Printed on retail packaging |
| Warranty | Manufacturer warranty |
In the Box
Frequently Asked Questions
Is it fast enough for 4K?
For standard consumer 4K bitrates, yes — V30 sustains 30MB/s. High-bitrate professional 4K formats are 1667x/V60 territory.
How many photos fit on 128GB?
Roughly 4,000-5,000 RAW files from a 24MP camera, or tens of thousands of JPEGs — a long trip on one card.
633x or 1667x?
The 633x is the UHS-I everyday card; the 1667x is UHS-II with double-plus the speed and a V60 guarantee for professional video. Match the card to the camera and the work.
Does it work in older cameras?
Yes — SDXC works in anything SDXC-compatible (2010 onwards, effectively). Very old SDHC-only cameras cap at 32GB cards.
Condition
Brand New — Retail Packaging
Warranty
Manufacturer warranty
Delivery
4–5 Working Days · Fully Tracked
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