B2B WHOLESALE ONLY UDP / MUDP / COB IATF 16949 SOURCE FACTORY

Custom USB flash modules — UDP, MUDP & COB — straight from the source factory.

Board-mount modules and finished drives for OEMs and resellers: USB 2.0 / 3.0 / 3.2, real verified capacity, and the firmware you need — preload, partition, CD-ROM emulation, write-protect. 100% H2testw tested with a report per batch, factory allocation through the 2026 shortage, and your branding on the shell.

UDP and COB USB flash modules in production at the source factory
UDP / MUDP / COBmodule & finished-drive packages
USB 2.0 / 3.0 / 3.2interface to suit the job
100%H2testw tested, report per batch
IATF 16949Guangdong source factory
Figures refer to our source manufacturing partner; exact specs per datasheet and grade.

The Problem We Solve

Firmware-faked sticks and co-mingled stock are wrecking buyer trust.

Marketplace USB drives are flooded with firmware-faked capacity — a stick reports 1TB to the OS but only holds a fraction of real NAND, then silently overwrites or loses data once it fills past the genuine size. Co-mingled warehouse stock means even a legitimate listing can ship a counterfeit. The fix isn't a bigger brand on the label, it's a traceable factory source: real NAND, real capacity, verified before it ships — and the margin that comes from buying direct instead of from a reseller's markup.

Capacity you can verify100% H2testw tested with a report per batch — and a sample to re-test on your own bench before volume.
Real NAND, named grade3D TLC or pSLC stated on the quote and datasheet — not hidden behind a sticker.
Direct-factory marginBuy from the line, not from a reseller's markup — the spread Amazon already prices in.

What We Supply

USB flash, by package and integration level

Pick the package to the build. We quote the interface, NAND mode and capacity range on every line — and publish the guaranteed usable capacity floor.

UDP / MUDP Module

USB 2.0 / 3.0 · controller + NAND in one moulded part

  • No separate connector or PCB — clean BOM
  • Slim sticks, IoT, set-top, embedded slots
  • MUDP micro/mini variant for tight spaces
COREBOARD-MOUNT

COB / PCB Drive

USB 2.0 / 3.0 / 3.2 · bare or cased

  • COB epoxy seal — shock- & moisture-resistant
  • PCB build for top capacities & 3.2 speeds
  • Solder-down footprints or finished housing
COBFINISHED

OEM Firmware & Branding

Your image · your shell · your part number

  • Preload / partition / CD-ROM emulation / write-protect
  • Custom VID/PID, serial rules, silkscreen / laser
  • Fixed BOM & locked part numbers for re-orders
WHITE-LABEL
USB flash modules — published specificationsInterface & NAND mode stated per SKU · 100% H2testw tested
PackageFormInterfaceNAND modeCapacity range¹
UDPMoulded module (integrated USB)USB 2.0 / 3.03D TLC / pSLC opt.4GB – 256GB
MUDPMicro / mini UDPUSB 2.0 / 3.03D TLC / pSLC opt.4GB – 128GB
COBChip-on-board, epoxy-sealedUSB 2.0 / 3.03D TLC4GB – 128GB
PCB / Finished driveController + NAND on PCB, casedUSB 2.0 / 3.0 / 3.23D TLC8GB – 512GB+
¹ Capacity ranges are typical by package and vary by NAND generation; exact capacities, interface and the guaranteed usable-capacity floor are stated on the per-SKU datasheet.   USB 3.2 Gen 1 speeds are for finished/PCB drives; UDP/COB modules are optimised for size and BOM rather than peak throughput.   Full datasheets and a sample batch available to qualified buyers on request.

Why Source-Factory

A USB drive is only as honest as the supplier behind it

Capacity and grade mean nothing if the next batch quietly swaps to smaller NAND or a re-flashed controller. Source-factory control is the whole point.

01
Stated interface & NAND

USB version and NAND mode on the datasheet per SKU — you quote and qualify against numbers, not a sticker.

02
100% H2testw tested — verify it yourself

Every unit capacity-tested with a report per batch, and you can re-run H2testw on arrival. No co-mingled inventory, no marketplace mystery stock — straight from the line, batch-traceable. We publish the guaranteed usable-capacity floor most sellers hide.

03
Locked & traceable

BOM, controller and firmware fixed per order, locked part numbers, every batch traceable — no silent swaps wrecking your RMA rate.

04
Allocation, confirmed at order

Authorized agent of an IATF 16949 source factory — stable lead times through the 2026 NAND shortage.

Who Buys This

Built for builders and resellers who can't ship a fake

Device & IoT OEMsSolder-down UDP/COB for sticks, set-top, medical and industrial gear — clean BOM, reflow specs supplied.
Promotional & branded USB sellersFinished drives with your logo, preloaded image and CD-ROM autorun — real capacity, no firmware fakes.
Distributors & resellersA direct factory source with the margin a marketplace markup already eats — allocation that survives the shortage.
Recovery / installer media makersWrite-protected, partitioned, CD-ROM-emulated drives that ship the same image every batch.

Pick the Right Package

The packaging and sourcing math, before you quote

Same standards as our specs — verifiable, plain-spoken. Use these to match package and grade to your build.

UDP USB flash module OEM guide

UDP vs COB vs PCB, solder-down vs finished, and the firmware options.

SLC / MLC / TLC / QLC / pSLC explained

What pSLC actually is and why it lasts so much longer.

How to vet a flash memory supplier

Counterfeit detection and the sourcing checklist before you commit.

FAQ

USB flash modules — sourcing questions

What is the difference between UDP, COB and a PCB USB drive?
They are three packaging levels for the same job. A PCB drive is the classic build: a controller and a separate TSOP/BGA NAND chip soldered onto a small printed circuit board, then cased. COB (chip-on-board) bonds the bare NAND and controller dies directly onto a substrate and seals them in epoxy — smaller, more shock- and moisture-resistant, common in slim and waterproof bodies. UDP (USB Disk in Package) goes further: controller and NAND are integrated into a single moulded module with the USB contacts built in, so it needs no separate connector or PCB. MUDP is the micro/mini UDP variant for tight spaces. UDP and COB are what you spec when size, drop-resistance and a clean BOM matter; PCB still wins on the very highest capacities and 3.2 speeds.
Do you supply solder-down (board-mount) modules or finished drives?
Both. We ship bare UDP / MUDP / COB modules for you to solder down onto your own board (USB sticks, IoT devices, set-top boxes, medical and industrial gear), and we ship finished USB drives — your housing or ours, packaged and ready to retail. Tell us whether you need board-mount footprints and reflow specs, or a finished product with your branding, and we quote the matching SKU.
Can you preload data, partition the drive, emulate a CD-ROM or set write-protect?
Yes — these are standard OEM firmware options. We can preload your image or installer at the factory, create fixed partitions, set a hidden or read-only partition, enable CD-ROM (autorun) emulation for installers and recovery media, and apply hardware or firmware write-protect so the contents cannot be altered in the field. Vendor ID / Product ID customisation and serial-number rules are available too. Send us the image and the behaviour you need and we lock it into the production firmware.
How do I know your capacity is real and not firmware-faked like marketplace sticks?
Every module is 100% H2testw capacity-tested with a report per batch, and you can re-run H2testw the moment it arrives. Firmware-faked sticks report a large size to the OS but only have a fraction of the real NAND, so they silently overwrite or lose data once they pass the genuine capacity — H2testw writes and verifies the whole drive, which is exactly how that fraud gets caught. Our stock comes straight from the source-factory line with a locked BOM and traceable batches — no co-mingled marketplace inventory where a genuine listing can ship a counterfeit.
How can a buyer verify a USB drive’s true capacity before shipping in volume?
Run H2testw (Windows) or F3 (Mac/Linux) on a sample — both write data across the full claimed capacity and then read it back, so a firmware-faked drive fails verification immediately. Don’t trust the size the OS reports or a quick file copy; a faked stick passes both until it is filled past its real NAND. We do this on 100% of units and include the report, and we send a sample batch before volume so you can confirm on your own bench. That is the difference between a traceable factory source and re-flashed stock from a marketplace.
What grade of NAND and which USB interface do you offer?
Interfaces run from USB 2.0 for cost-driven and embedded jobs up to USB 3.0 / 3.2 Gen 1 for finished high-speed drives. NAND grade is stated on every quote: mainstream 3D TLC for general OEM, with higher-endurance grades or pSLC (cells run in 1-bit mode) available for industrial and write-heavy use. We put the NAND mode and interface on the datasheet rather than leaving it to a sticker — different grades carry different endurance and price.
What is the MOQ and lead time during the 2026 NAND shortage?
As an authorized agent of a source factory we confirm price and lead time at order, so they hold firm while spot-market supply dries up. MOQ runs from carton level for resellers and module quantities for board-mount integrators, up to volume tiers for distributors. Tell us package (UDP / MUDP / COB / finished), capacity, interface and monthly volume and we return a real factory quote, usually the same business day.

Request for Quote

Lock your USB-module supply — quote in 24 hours

Tell us package (UDP / MUDP / COB / finished), capacity, interface, any firmware options and monthly volume. We reply with a real factory quote, usually the same business day — and a sample batch on request so you can H2testw-verify before you commit.

B2B inquiries only. Quotes valid 3–7 days, subject to final confirmation — the NAND market is moving fast.