MRT3C Memory is a 15-year flash memory manufacturer specializing in wholesale SD cards, USB flash drives, and custom storage solutions. All products use top-grade NAND Flash from Samsung, SanDisk, Intel, and Micron — fully tested before shipment to achieve a near-zero defect rate.
(Looking to test before you order? MRT3C Memory provides free samples so you can evaluate our SLC, MLC, TLC, and QLC NAND flash memory cards firsthand. We also offer free logo design for all customers.）
(Concerned about quality? Worried about a complicated RMA process? Working with MRT3C Memory is simple — we’ll replace any defective card free of charge under normal use.)
(We promise all bulk orders ship within 24 hours, whether you have an urgent deadline, the shipment will proceed no later than 48 hours; also we are using DHL express, FedEx and UPS for all the orders, it can guarantee shipping time less than 5 days)
100-499 pcs: Standard Rate
500-999 pcs: -15%
1000+ pcs: -30% + Free Shipping
Lifetime Warranty
1:1 Replacement for defects
24h Engineering Support
All MRT3C Memory products meet SDA standards and are rigorously tested to serve clients worldwide. Our products carry full CE, FCC, RoHS, REACH, and Hi-Speed USB certifications.
Welcome to MRT3C — a leading wholesale supplier of memory cards and USB flash drives. We supply worldwide at factory-direct prices.
We provide customized samples for evaluation — try before you buy, with no obligation.
Choose from 4 printing methods: silk printing, photo printing, laser engraving, or embossing. Free logo design included for all clients.
Choose from plastic boxes, paper boxes, wooden boxes, paper cards, clamshells, plus key rings and lanyards..
Preload files, catalogs, videos, music, or any authorized content onto your bulk SD cards and USB drives.
We provide custom controllers and flash memory to ensure full compatibility with your equipment.
As a 15-year NAND flash memory manufacturer, MRT3C delivers only high-performance, reliable memory products.
The Flash chips: MRT3C has a stable and reliable supply chain of Memory chips. We partner with the world’s leading chipmakers, including Samsung, SanDisk, Intel, and Micron. Furthermore, all firmware and components are produced in-house. This is a guarantee for high quality.
Manufacturing: We operate dedicated production lines for both microSD and SD cards. Also, the production process is 90% automated. Our capacity: up to 100,000 units per day.
Testing: All pieces of bulk Memory cards are fully tested before and after final production. Every card undergoes rigorous testing: temperature, ESD, vibration, durability, and endurance tests. We also run H2 tests to detect and eliminate defective dies before shipment.
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Bulk SD Cards
CF Card
USB Flash Drive
SSD NAND
Adapter and Accessory