KALSTOR MEMORY & STORAGE — Kalstor home EN ES — Switch to Spanish Get a Quote
Compact USB flash modules held in an automated production fixture
USB FLASH MODULES / OEM SUPPLY

USB flash modules built around your integration

UDP, MUDP, COB and PCB solutions for board integration or finished drives. Interface, usable capacity, firmware behavior, test scope and housing are defined for the quoted project.

View packages & options
UDP / MUDPCompact integrated modules
COB / PCBBare or finished-drive builds
Firmware optionsDefined against project requirements
Capacity testedVerification scope confirmed per order

The Problem We Solve

A module needs a controlled configuration and acceptance test

An OEM USB product is more than a capacity label. Package dimensions, controller firmware, usable capacity, host compatibility and test coverage all affect the finished device. The project needs a defined configuration and acceptance plan that can be repeated across production lots.

Capacity you can verifyDefine full-address test coverage and independently repeat the acceptance test on samples.
Configuration by part numberInterface, controller, NAND and firmware requirements recorded for the quoted build.
Integration details firstMechanical drawing, assembly method and host behavior reviewed before production.

What We Supply

USB flash, by package and integration level

Pick the package to the mechanical and electrical design. The quote identifies interface, usable capacity, controller platform, firmware behavior and production-test scope for the proposed build.

UDP / MUDP Module

Integrated controller, NAND and USB contact area

  • No separate connector or PCB — clean BOM
  • Compact USB products and embedded assemblies
  • Package drawing and assembly method confirmed per SKU
COREBOARD-MOUNT

COB / PCB Drive

Bare module, PCB assembly or finished housing

  • COB epoxy seal — shock- & moisture-resistant
  • PCB build supports a wider range of controller platforms
  • Interface and performance confirmed for the selected build
COBFINISHED

OEM Firmware & Branding

Your image · your shell · your part number

  • Preload, partition and read-only options where supported
  • Custom VID/PID, serial rules, silkscreen / laser
  • Configuration control where supported by the selected platform
WHITE-LABEL
USB flash modules — integration comparisonInterface, NAND and test scope confirmed for the quoted SKU
PackageFormInterfaceNAND modeCapacity range¹
UDPMoulded integrated modulePer controller platformConfirmed per SKUProject-dependent
MUDPCompact moulded modulePer controller platformConfirmed per SKUProject-dependent
COBEncapsulated chip-on-board modulePer controller platformConfirmed per SKUProject-dependent
PCB / Finished driveController and NAND on PCBConfirmed per buildConfirmed per SKUProject-dependent
Package type does not by itself determine USB generation, sustained speed or capacity. Confirm the controller platform, NAND configuration, mechanical drawing, firmware and test conditions for the quoted SKU. Full specifications and qualification samples are supplied subject to project review and availability.

Why Controlled Sourcing

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

Capacity and interface claims are useful only when they belong to a defined build and are carried into the acceptance plan for repeat production lots.

01
Stated interface & NAND

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

02
Defined test coverage

Full-address verification, sampling level and report format are agreed for the order and can be repeated during incoming inspection.

03
Controlled & traceable

Where supported, controller, NAND, firmware and part-number controls are documented with the applicable lot-identification and change-notification terms.

04
Availability confirmed

Controller, NAND, housing, MOQ and lead time are confirmed for the quoted configuration.

Who Buys This

Built for projects that need repeatable USB storage

Device & IoT OEMsCompact USB storage assemblies selected from mechanical, host and environmental requirements.
Finished-drive programsHousing, packaging and content preload defined as part of the production specification.
Distributors & integratorsControlled part numbers and repeatable capacity-testing requirements for customer programs.
Recovery / installer mediaPartitioning or read-only behavior implemented only on supported controller platforms and verified on the target OS.

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?
A PCB drive uses separate controller and NAND packages on a printed circuit board. COB mounts bare dies on a substrate and encapsulates them, producing a compact module. UDP integrates the USB controller, NAND and contact area into a moulded package; MUDP refers to smaller package variants. These formats differ in dimensions, assembly method, available controller platforms and capacity options, so the mechanical drawing and interface must be confirmed for each project.
Do you supply solder-down (board-mount) modules or finished drives?
Both bare modules and finished drives can be quoted. Integration method varies by package: some modules are used as the complete internal USB storage assembly, while others are attached to a carrier or product housing. Send the mechanical drawing, connector arrangement and assembly process so the correct package and handling requirements can be checked.
Can you preload data, partition the drive, emulate a CD-ROM or set write-protect?
Some controller platforms support content preload, partitioning, read-only modes, CD-ROM emulation, VID/PID settings or serial-number rules. Support is controller- and firmware-dependent, and operating-system behavior must be validated. Send the required behavior and content image so feasibility and the verification method can be defined before production.
How do I know your capacity is real and not firmware-faked like marketplace sticks?
A full-address write-and-read verification can detect false reported capacity and media errors that a quick file copy misses. The production test method, sampling level or full-unit scope and report format are confirmed for the order. Buyers can independently repeat H2testw on Windows or F3 on macOS/Linux using representative samples.
How can a buyer verify a USB drive’s true capacity before shipping in volume?
Run H2testw on Windows or F3 on macOS/Linux against representative samples. These tools write and read the addressable space, which is more meaningful than checking the capacity reported by the operating system. Test time, usable capacity, filesystem overhead and acceptance criteria should be recorded in the incoming-inspection plan.
What grade of NAND and which USB interface do you offer?
Available interfaces and NAND configurations depend on the package and controller platform. USB 2.0 and higher-speed USB options cannot be inferred from the housing or contact color. The quotation identifies the interface, controller platform, NAND configuration and applicable performance conditions for the proposed SKU.
How are MOQ and lead time determined?
MOQ and lead time depend on package, controller platform, capacity, firmware work, housing, packaging and current component availability. Send the required configuration and forecast; the quotation will state the applicable MOQ, sample plan, production lead time and validity period.

Request for Quote

Define the module around your product

Tell us package, mechanical limits, capacity, host interface, firmware behavior, housing, test requirement and forecast. We will propose a feasible configuration and define the sample and verification steps.

B2B inquiries only. Specifications, MOQ, availability and lead time are confirmed for the quoted configuration.