Sourcing USB drives and memory cards from China

Zero duty

Read from the UK Trade Tariff on 25 September 2026, unrecorded solid-state non-volatile storage devices, which cover USB flash drives and memory cards, unrecorded smart cards and other unrecorded media carried 0% duty on goods from China, with no anti-dumping measure. For optical media, see our blank optical disc sourcing guide. For label-format media, see our NFC label tag sourcing guide. For audio recording media, see our blank magnetic audio tape sourcing guide. For SIM cards, see our SIM card sourcing guide. For video recording media, see our blank video cassette sourcing guide.

Pre-loaded drives, with software, music or files on them, can classify differently from blank ones, so confirm the commodity code if content is loaded in China.

Fake capacity and flash grade

The best-known problem with cheap storage is a controller programmed to report a larger capacity than the chip holds: files beyond the real capacity are lost without warning. Test every sample by writing and reading the full capacity, not by reading the reported size, and repeat on production samples at inspection. For SSD purchases, see our solid-state drive sourcing guide.

Flash comes in grades, and a quote that looks cheap may be using downgraded chips. Name the flash grade and the controller in the product specification, and measure read and write speeds against the figures you will print on the packaging. For industrial applications, see sourcing industrial microSD memory cards. For USB modules, see our industrial USB flash module sourcing guide.

Brands and trademarks

Memory cards with a famous brand's name from an unknown supplier are one of the most common counterfeits, and importing them is a trademark problem as well as a quality one. Buy branded product only through the brand's authorised channel, and put your own brand on own-label stock; the IP guide covers the risks.

The same applies to logos on promotional drives: the customer must own or be licensed to use the logo printed on them.

Worked duty example

For a made-up shipment of 20,000 promotional USB drives under 8523 51 10 00, add the £1,500 of freight and insurance to the £40,000 free-on-board price and customs sees £41,500. Duty on USB flash drives is zero, leaving import VAT of £8,300, 20% of the customs value. For a VAT-registered buyer that is a cash-flow cost rather than a lasting one. The duty and VAT guide walks through the calculation.

Inspection checklist

Capacity and speed: every sampled unit written and verified across its full stated capacity with a capacity test tool, read and write speeds measured with a benchmark tool against the speeds on the pack, and SD Association speed class, UHS and video speed class markings on cards checked against the measured results. For industrial applications, see our industrial microSD sourcing guide.

Electronics and compliance: controller and flash chip markings recorded on opened samples against the approved sample, ESD robustness checked by the method of IEC 61000-4-2 where the buyer specifies it, EMC evidence to BS EN 55032 for the drive, and a declaration under the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulations 2012.

Casing and content: printed logos tested for adhesion and rub resistance, caps, swivels and key rings pull-tested, preloaded files and write protection checked on samples, and branded cards accepted only with proof of the authorised channel.

What goes wrong

Storage fails on capacity, speed and authenticity. Controllers are programmed to report more capacity than the flash holds, so files beyond the real capacity are silently lost, and cheap or recycled flash chips are slow and wear out quickly. Branded memory cards from unofficial channels are counterfeit, preloaded files are missing or corrupted, printed logos rub off casings, and key rings and caps break.

Write and verify the full stated capacity on samples from every batch, test read and write speeds against the specification, check chips and controllers on a sample, buy branded products only through authorised channels, check preloaded content and write protection, test print adhesion, and pull-test key rings and caps before shipment.

Promotional USB drives

Branded USB sticks are a common corporate gift, where the casing, print and packaging matter as much as the chip. Agree the casing sample, the print method and Pantone colours, and whether files are pre-loaded, and check the print on production pieces; the promotional merchandise guide covers the wider category.

Cambridge China Bridge sources own-brand and promotional USB drives and memory cards, with capacity and speed tested on every batch before shipment. See how our sourcing service works.