Samsung MB-MJ128KA/AM

Overview

The Samsung MB-MJ128KA/AM is a microSDXC memory card designed for continuous video recording with 128GB of storage capacity. It delivers sequential read speeds up to 100 MB/s and write speeds up to 40 MB/s, ensuring smooth data transfer and reliable performance for devices like surveillance cameras, dash cams, and body cameras. Built to endure up to 70,080 hours of recording, this card supports high-quality video capture without dropped frames, meeting V30 and U3 speed standards.

Key features

• Long-lasting endurance rated for over 70,000 hours of continuous recording, ideal for demanding surveillance and monitoring applications
• Consistent write speeds of at least 30 MB/s to support uninterrupted high-resolution video recording
• Durability against environmental hazards including magnets, X-rays, water, and accidental drops, providing reliable operation in harsh conditions
• Wide operating temperature range from -13°F to 185°F, suitable for both indoor and outdoor use across various climates
• Includes a full-size SD adapter to expand compatibility with devices that accept standard SD cards, simplifying data transfer and device integration

Key specs

• Storage capacity: 128 GB
• Sequential read speed: up to 100 MB/s
• Sequential write speed: up to 40 MB/s
• Minimum write speed: 30 MB/s (V30, U3, Class 10)
• Endurance: up to 70,080 hours of continuous recording
• Operating temperature: -13°F to 185°F
• Durability: resistant to magnets, X-rays, water, and drops

Connectivity and compatibility

The included full-size SD adapter allows this microSDXC card to be used in a wide range of devices beyond microSD slots. This flexibility makes it easy to transfer files or expand storage on cameras, laptops, and other electronics that accept SD cards. The card’s compliance with UHS-I standards ensures compatibility with most modern devices requiring fast and reliable memory cards.

Ideal uses and environments

This memory card is well suited to security professionals, drivers using dash cams, and anyone needing dependable video storage in challenging environments. Its endurance and durability make it a strong choice for continuous recording in surveillance systems, body cameras, and other applications where reliability over long periods is critical. The wide temperature tolerance also supports use in outdoor settings with varying weather conditions.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, with tags, manuals, accessories, and original, unaltered packaging. Any item kept will be deducted from the refund. Start a return by sending us an email. Items sent back without approval may be refused or returned to the sender.

Some items are not returnable: opened TVs/combos/monitors 37″+, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method; allow 5–7 business days for the credit to post. Shipping, handling, customs duties, and import taxes are nonrefundable. If an item is used, incomplete, or not in original condition, a 30% restocking fee may apply. Direct exchanges are not offered; purchase the replacement and return the original for a refund.

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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