# United States tariff line 8471.70.10.00: Without read-write unit assembled therein; read-write units entered separately > In the United States tariff, line 8471.70.10.00 covers storage units, magnetic disk drive units, for a disk of a diameter exceeding 21 cm, without read-write unit assembled therein; read-write units entered separately. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 8471.70 in heading 84.71 (chapter 84). Source: https://border.bot/countries/united-states/hs-codes/8471701000 Last updated: 9 October 2026 [Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 84](https://border.bot/countries/united-states/hs-codes/84) / [8471.70](https://border.bot/countries/united-states/hs-codes/847170) / [8471.70.10.00](https://border.bot/countries/united-states/hs-codes/8471701000) ## Key facts - Tariff line: 8471.70.10.00 - Covers: Storage units, magnetic disk drive units, for a disk of a diameter exceeding 21 cm, without read-write unit assembled therein; read-write units entered separately - Duty (MFN): Free - Additional duties: None recorded - Restrictions: None recorded - Tariff: [United States](https://border.bot/countries/united-states) - HS subheading: [8471.70](https://border.bot/hs-codes/847170) ## What this line covers In the United States tariff, line 8471.70.10.00 covers storage units, magnetic disk drive units, for a disk of a diameter exceeding 21 cm, without read-write unit assembled therein; read-write units entered separately. Its legal text is “Without read-write unit assembled therein; read-write units entered separately”, read under “Storage units”, “Magnetic disk drive units” and “For a disk of a diameter exceeding 21 cm”. ## How it is structured It falls under HS subheading 8471.70 in heading 84.71 (chapter 84). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff. - Chapter 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof - Heading 84.71: Automatic data processing machines and units thereof; magnetic or optical readers, machines for transcribing data onto data media in coded form and machines for processing such data, not elsewhere specified or included - Subheading 8471.70: Storage units - Within the subheading: Magnetic disk drive units - Within the subheading: For a disk of a diameter exceeding 21 cm - Line 8471.70.10.00: Without read-write unit assembled therein; read-write units entered separately ## Duty Goods under this line enter free of general (MFN) duty. ## In other countries No other national tariff on border.bot has live lines under 8471.70 yet. - [The Harmonized System text for 8471.70](https://border.bot/hs-codes/847170) ## Other lines under 8471.70 - [8471.70.20.00](https://border.bot/countries/united-states/hs-codes/8471702000) Units for physical incorporation into automatic data processing machines or units thereof - [8471.70.30.00](https://border.bot/countries/united-states/hs-codes/8471703000) Other - [8471.70.40.35](https://border.bot/countries/united-states/hs-codes/8471704035) Flexible (floppy) magnetic disk drive units - [8471.70.40.65](https://border.bot/countries/united-states/hs-codes/8471704065) Hard magnetic disk drive units - [8471.70.40.95](https://border.bot/countries/united-states/hs-codes/8471704095) Other - [8471.70.50.35](https://border.bot/countries/united-states/hs-codes/8471705035) Flexible (floppy) magnetic disk drive units - [8471.70.50.65](https://border.bot/countries/united-states/hs-codes/8471705065) Hard magnetic disk drive units - [8471.70.50.95](https://border.bot/countries/united-states/hs-codes/8471705095) Other - [8471.70.60.00](https://border.bot/countries/united-states/hs-codes/8471706000) Not assembled in cabinets for placing on a table, desk, wall, floor or similar place - [8471.70.90.00](https://border.bot/countries/united-states/hs-codes/8471709000) Other - Previous line: [8471.60.90.50](https://border.bot/countries/united-states/hs-codes/8471609050) Other - Next line: [8471.70.20.00](https://border.bot/countries/united-states/hs-codes/8471702000) Units for physical incorporation into automatic data processing machines or units thereof ## Frequently asked questions ### What does tariff line 8471.70.10.00 cover in the United States tariff? In the United States tariff, line 8471.70.10.00 covers storage units, magnetic disk drive units, for a disk of a diameter exceeding 21 cm, without read-write unit assembled therein; read-write units entered separately. ### What is the general (MFN) duty on 8471.70.10.00 in the United States? Goods under this line enter free of general (MFN) duty. ## Sources and updates The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026. The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026. The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026. This page was last updated on 9 October 2026. Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling. Official source files: - https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false Machine-readable: https://border.bot/countries/united-states/hs-codes/8471701000.json