Buyer questions, answered directly

Test it with H2testw. The tool writes test files across the whole drive and reads them back, so it reports the capacity you can actually store data in — not the capacity the controller claims.

NAND dies are graded by how much testing they passed before being sold on, and the market describes three tiers. Original grade comes from the manufacturer fully tested and meeting full specification.

"Industrial grade" is not a single standard. It is a group of claims that should each be independently documented: an extended operating temperature range, a published endurance figure for total bytes written, a controlled bill of materials with a defined silicon source, and a long-term supply commitment.

Use approximate working figures per gigabyte: about 1,000 documents, 200 high-resolution photos, 250 songs, or around 40 minutes of 1080p video. That means a 32GB card holds roughly 6,400 photos or 21 hours of 1080p footage, and a 128GB card holds roughly 25,600 photos or 85 hours.

Yes. Every unit goes through capacity verification and read/write testing as part of our production flow, before packing — not as a separately requested extra that adds cost.

OEM means you supply the design and we build it; ODM means we supply a proven design that you brand and slightly adapt. For flash, the line is practical rather than legal: a USB drive made to your own mould, your own PCB and your own artwork is OEM; a drive built on our standard body with your print and your chosen capacity is closer to ODM.

Our products are built to RoHS material standards (restriction of hazardous substances) and we can provide the relevant compliance documentation on request; for goods placed on the EU market the CE mark applies and for the US the FCC covers electromagnetic compatibility. We list RoHS, CE, FCC and SGS among our credentials.

A TF card (also called MicroSD) is the small 15 × 11 × 1 mm card; an SD card is the larger 32 × 24 mm format. They use the same underlying flash and controller logic, but the physical size and pin layout differ, so a TF card needs an adapter to fit an SD slot.

Ask for evidence a trading company cannot fake: the production steps they actually run, photos of their own line, and the ability to discuss silicon grade and controller selection as engineering decisions rather than price points. A real factory can name the stages from wafer sorting and testing to SMT assembly and capacity verification, and can show the floor where those happen.

A custom mould is the tool we cut to form a USB drive in your own shape — a product silhouette, a logo in 3D, or a mascot. You need one when no standard body carries your brand the way you want, usually for a premium gift or a campaign where the shape itself is the message.

A complete quotation states the product, capacity, interface, flash grade, any specified source or controller, unit price, tooling (if any), packaging, the Incoterm and who arranges freight, payment terms, lead time and how long the price is valid. What is "extra" is usually the ocean freight, insurance and import duty (under FOB), third-party re-testing to a specific certificate, and any post-production service you did not ask for.

Write a single file larger than the drive's cache, and time it. That is the whole method.

Estimate by write volume, not by calendar time. Flash wears out from erasing and rewriting cells, so a drive that is written once and read many times can last many years, while one rewritten continuously can wear out in months.

These three terms describe how a USB flash device is physically built, and they are often used loosely. COB (Chip-On-Board) refers to bonding the bare silicon die directly to the board instead of soldering a packaged chip — a manufacturing method.

Normalise to landed cost per usable gigabyte, then check what each price actually includes. A unit price is not comparable across quotes until you add freight, duty, tooling amortisation, packaging, testing and payment fees, and divide by the capacity you can actually use — not the nominal number.

Choose by how the storage connects to the product, not by capacity or price. A USB drive is for products where the user plugs and removes it — promotional gifts, software delivery, portable storage.

USB-A is not going away, but it is no longer the safe default. New laptops and most phones are USB-C only, so a USB-A drive handed to a modern user may simply not fit.

Memory capacity is being absorbed by AI data centres at a rate the supply chain did not plan for, and the effect has reached consumer and component pricing. Published reporting during 2026 describes memory card prices rising by more than 100% year on year, projected increases in SLC NAND pricing of up to 170%, and industry stockpiles falling to under ten days of supply.

We are a manufacturer, not a trading company. The legal entity is Shenzhen Wintel Digital Technology Limited, registered in China since 2015, and we run our own flash memory production floor in Shenzhen — wafer sorting and testing, SMT assembly, moulding, printing and capacity verification all happen in-house.

Yes. On custom USB drives we apply your branding by silk-screen printing, full-colour printing or laser engraving, on metal, PVC or wood bodies, with bulk, retail or presentation packaging.

MOQ is not one number for every product. It is set by the capacity, the controller solution and how much customisation is involved, and it is confirmed against your specific quotation rather than read from a generic table.

Lead time depends on the configuration, the branding and whether tooling — a new mould — is needed, and it is confirmed in the quotation against your target date rather than taken from a fixed schedule. A repeat order of a product we already run is faster than a first order that needs a bespoke mould and artwork approval.

Price is set by the configuration you specify — capacity, interface, body material, branding method, packaging and quantity — not by a single list price. In the 2026 memory market, the silicon grade and the quotation validity period matter as much as the unit number, because flash pricing has moved sharply and a price quoted without a stated grade or validity window is not a commitment.

We supply project volumes to buyers in more than 50 countries, shipping from our facility in Shenzhen, China. Standard shipping terms and the departure method are confirmed per order, because they depend on your destination and whether you want the goods delivered to your door or collected at the origin.

Yes, both. You can come to the plant in Shenzhen, or we can run a live guided walkthrough on video — the second works just as well for checking the production line, the test stations and the quality checks, because you drive the camera.

Samples start with a specification, not a request. Send the capacity, interface, application and target quantity, and we confirm what can be sampled from the line, what has to be built, and the sample cost against that.

Payment is 30% deposit with the balance due before shipment by T/T, and quotations are held for 30 days from the date they are issued. Both are stated on the quotation itself rather than on a general terms page, so the figures that apply to your order are the ones you were given before you committed.

Yes, for UDP modules and semi-finished boards, which are sold as designs rather than catalogue items. You bring the design and the placement requirements; we build against it and confirm the parts that decide what you receive — host interface, capacity, mechanical length, controller matched to your host, whether the part carries a device identity, and the reflow profile it has to survive.

Our standard term is FOB Shenzhen: we deliver the goods on board the vessel at the Shenzhen port, and ownership and risk pass to you at that point. You arrange and pay for the main freight, insurance and import clearance from there.

You can request a source. We source silicon from SanDisk, Toshiba, Micron, SK Hynix, Intel and Samsung, and we will state the silicon origin on the quotation rather than leaving it implicit.

Yes, for UDP modules and semi-finished boards the controller is a specification line, not a hidden choice. We work with Alcor, ITE, Xinbang and Micov controllers in QFN, 24-pin, 48-pin and COB packages, and the right one is matched to your host interface, capacity and workload.

Specify USB 3.0 when the drive moves large files often — video, imaging, backups, or any workflow where transfer time is real money. USB 2.0 is fine for small-file delivery, software installers, licence keys and boot media where the few extra dollars per unit are better spent elsewhere.

Yes. We can preload your content — software installers, presentation files, manuals, marketing assets or a read-only partition — during production, so the units arrive ready to hand to your customers.

We supply bulk trays, anti-static bags, plain or printed retail blister packs, and custom presentation boxes, depending on whether the unit is a component or a gift. For embedded parts (UDP, semi-finished board) bulk and anti-static is the norm.

On request we can provide RoHS, CE and FCC related compliance documentation and SGS involvement where applicable, plus a certificate of conformance for the batch. We do not publish a folder of certificates on the site because the exact document depends on the product and destination; instead we issue the relevant papers against each order.

Yes, this is a normal way to start a custom order: you send a sample drive or card and we assess what it would take to build the same thing. We measure the mechanical form, identify the interface and capacity we can confirm by test, and tell you honestly what we can and cannot replicate — including where a claimed spec does not match the physical unit.

Protecting your design starts with the contract, not the factory floor. We treat your artwork, mould and specification as your property; the mould we make for your shape is yours, and we do not use it for another customer.

Yes, and for custom or embedded orders we recommend it. An engineering sample is built to your specification before the full run so you can confirm the form, interface, capacity and marking on a real unit rather than from a drawing.

Yes, as long as the product and branding are the same, you can mix capacities in one order — for example 8GB, 16GB and 32GB drives with your logo. The capacity is set per unit during programming, so a mixed run is a scheduling choice, not a different product.

Send your artwork as a vector file where possible (AI, EPS, PDF) plus any colour references, and tell us the method — silk-screen, full-colour print or laser engraving — which we match to the body material. We proof the print before mass production, so you see the mark on the actual material rather than on screen.

Yes. We can preformat to FAT32 or exFAT as part of production, which is what most buyers want because the unit works the moment it is plugged in.

Yes. USB-C is available on our USB drives and on UDP modules where the host calls for it, and it is increasingly the default for new products because one connector works across phones, laptops and peripherals.

Yes, that is what a custom mould is for. Send your design — artwork, a product photo, a 3D file or even a sketch — and we turn it into a mould and a drive.

Tooling pays for itself across repeats, so the question is total volume over the life of the product, not a single order. A one-off small run is usually better on a printed standard body; a shape you will reorder for campaigns or as a standing gift earns the mould back quickly.

A quotation is valid for 30 days by default, which protects both sides against a spot market that has moved sharply in 2026. If you need a longer fixed price, we can discuss it for a committed volume, because locking a price means we carry the silicon risk for that window.

For standard products we can provide the specification sheet (dimensions, weight, interface, capacity range, grade) and factory photography of the actual product. For a custom or moulded product the datasheet is built from your approved specification, and the photography comes from the sample we produce.

Lead time is set by configuration, branding and whether tooling is new; the part you control is the forecast. A rolling forecast or a standing reorder lets us plan silicon and line time ahead of your actual order, which shortens the wait when the PO lands.

Check the price against the memory content first, then test one unit destructively. A drive priced below roughly the cost of the NAND inside it is not a bargain — flash has a floor cost, and a product under that floor is reporting capacity it does not have.

Check the four things the bulk order can drift on: capacity, speed, physical build, and behaviour on your own equipment. Capacity by full write-and-read-back, not a folder copy.

Start from the data the device will hold at its worst moment, not the average, then add headroom for the file system and for growth. Calculate the realistic payload, multiply by the number of files the device must retain, and add roughly 10–15% for file system overhead and fragmentation.

A dashcam needs high endurance, not high speed and not high capacity. It writes continuously whenever the vehicle is on, often in a hot windshield-mounted enclosure, and it loops — overwriting the oldest footage forever.

Check three things before anything else: whether the camera writes continuously or only on motion, how hot the housing gets, and what happens when the card fills or the power fails. A 24/7 camera is the same endurance problem as a dashcam but with two additions — it may run for years without intervention, and it is often the only copy of footage that matters after an incident.

Order for the moment of handover, not for the datasheet. That means content that opens on a phone without software, a physical form that survives a bag, and a quantity with a buffer.

Design in soldered storage, not a removable card, and size it by write volume rather than by capacity headline. A logger writes continuously for years with no user present, so the two things that decide success are how the writes are distributed across the memory and what happens when power is lost.

Size down, not up. DJ equipment and audio players read media rather than write to it, so endurance is irrelevant, and a large, fast drive often behaves worse than a small, plain one — some players index slowly, some choke on very large libraries, and some simply do not recognise high-capacity devices.

Specify for temperature range, power integrity and service life — not for capacity or speed. Industrial control systems run for years in cabinets that get hot, on supplies that are rarely clean, and often in places where a service visit is expensive.

Buy for consistency and physical durability, not capacity. Education deployments involve many identical devices, handled by children, replaced on a budget cycle, and often imaged from a single master.

It does not ship. That is the position we work to, and it is only enforceable because the acceptance standard is written down before production starts — which is also the only way you can hold anyone to it.

We are liable for what we ship: that the goods match the approved specification, are tested before packing, and are built to the configuration quoted for your order. What we do not do is pass on a consumer warranty that belongs to another company.

Yes. A certificate of conformance (CoC) is issued per batch and states what the batch is: product type, capacity, flash grade, any specified NAND source or controller, and the tests passed before packing.

The mould we cut for your custom shape is your property and we hold it for your reorders rather than scrapping it. It stays stored and reserved for your batches, and the same tool is what keeps a later order the same shape as the first.

We verify capacity and read/write on every unit before packing, and we hold a defined acceptance level agreed with you rather than a number we pick alone. The practical measure is a random sample from the production batch, tested and compared against the approved reference; the result is what sets whether the batch ships.

Yes, and holding the configuration is the point of reordering with a factory rather than re-buying each time. We keep the approved specification — silicon grade, controller, capacity and marking — against your order record, and we compare a unit from each new batch to the approved sample.

For a confirmed defect — a unit that fails capacity or read/write verification, or does not match the agreed specification — we replace or rework the affected units, and we cover the cost of putting it right. The basis is the batch test and the approved sample, not a debate after the fact: if a random sample from your batch misses the criterion we agreed, the batch is fixed before it ships, or replaced if it already did.

You cannot verify memory brand from the outside, so verify it three ways instead: make it contractual, make it traceable, and test the behaviour that differs. Contractually, the BOM including memory brand and grade must be locked, with substitution requiring your written approval.

POS drives fail for reasons that have little to do with the drive's quality: they are inserted and removed many times a day, the port is often in a tight or recessed location, staff remove them mid-operation, and the terminal may be running an embedded system with a narrow tolerance for unusual devices. Choose a drive with a robust connector, a slim body that fits the port, and a controller confirmed to enumerate on that terminal model — then standardise it, because changing drives between batches is what breaks fleets..