Exact model guide · SKU 30701
UGREEN 30701 USB-C to USB-A 3.0 OTG Adapter
A short adapter lead with a USB-C male host plug and one USB-A 3.0 female peripheral socket. It lets a compatible USB-C computer, tablet or phone use a USB-A flash drive, keyboard, mouse, receiver, controller or other supported data device.
Product overview
Overview
UGREEN 30701 changes the physical connector available at a host from USB-C to USB-A female while preserving ordinary USB data behavior. The USB-C male end belongs at the computer, phone or tablet; the USB-A female end receives a peripheral. It does not reverse a device-only USB-C port into a host.
On a compatible USB 3.0 path, the theoretical interface ceiling is 5Gbps. A USB 2.0 peripheral, older host controller, slow flash drive, filesystem or additional hub will negotiate or perform at a lower rate. The adapter cannot make the attached device faster than its own interface.
Phones and tablets impose extra limits. They must expose USB OTG/host mode, supply enough current and understand the peripheral class and filesystem. A keyboard or flash drive can work while a bus-powered HDD, capture device or specialised controller may not.
Verified highlights
Key features
- Clear connector direction: USB-C male host plug to one USB-A female peripheral socket.
- USB 3.0 data path: up to 5Gbps theoretical when the host, adapter and peripheral all operate at USB 3.x speed.
- OTG use: lets a host-mode USB-C phone or tablet enumerate supported USB peripherals.
- Backward operation: USB 2.0 and USB 1.1 peripherals can negotiate their lower rate.
- Short flexible lead: reduces leverage on the host USB-C port compared with a rigid one-piece adapter.
- Single peripheral port: one USB-A connection without hub, display, network or memory-card functions.
- Plug-and-play link: the adapter normally needs no driver, though the connected peripheral may need an app, driver or permission.
Know the exact connector roles
Host, peripheral and signal direction
USB connector gender does not determine whether a device can act as a host. The USB-C source device must support host/OTG operation before any peripheral can enumerate.
- USB-C male: inserts into the computer, tablet or phone that will control the connection.
- USB-A 3.0 female: accepts the plug or receiver of one compatible USB peripheral.
- Data: bidirectional USB traffic flows between host and peripheral after enumeration.
- Power: conventional USB bus power comes from the host within its available current; no new power source is created.
- OTG role: a phone/tablet must switch to host mode. A USB-C charging port with no data/host support will not work.
- No alternate-mode conversion: the adapter carries USB data, not DisplayPort Alt Mode, HDMI or analogue audio.
- One-device path: it is not a hub. A separate compatible powered hub may be needed for multiple or higher-draw devices.
Where it makes sense
Use scenarios
Use 30701 to bridge a common USB-A accessory into a host that offers USB-C but no full-size USB port.
- Open files from a USB-A flash drive on a laptop, tablet or phone whose OS supports the drive’s filesystem.
- Connect a USB-A keyboard or mouse receiver to a USB-C computer for temporary or everyday input.
- Use a supported game controller with an OTG-capable phone or tablet and an application that recognises that controller.
- Attach a printer, scanner, audio interface or camera only when its normal driver, app and power requirements are met by the host.
- Connect a card reader or storage device at a service desk while treating safe ejection and file-write completion normally.
- Add a compatible externally powered USB hub when several peripherals are required and the USB-C host supports the complete topology.
A dependable first connection
Setup and usability guidance
Prove the peripheral on a normal USB host first, then insert this adapter directly into the intended USB-C host.
- Check that the USB-C device supports data and USB host/OTG mode; a charging specification alone is insufficient.
- Confirm the USB-A peripheral works, has the required driver/app and does not exceed the host’s available bus power.
- Insert the USB-C male plug fully into the host without bending or twisting the short lead.
- Connect one USB-A peripheral to the female socket and allow the operating system time to enumerate it.
- On a phone or tablet, approve any storage, MIDI, audio or accessory permission prompt and open the appropriate application.
- For storage, verify the correct volume before copying and use eject/unmount before unplugging.
- If detection fails, remove hubs/extensions, test another host port and try a low-power keyboard or flash drive to separate OTG and power issues.
Match the whole chain
Compatible devices and systems
The adapter is broadly class-compliant, but each peripheral still depends on host mode, drivers, power and operating-system support.
- USB-C laptops and desktops whose port carries USB data and host mode.
- USB-C phones and tablets that explicitly support USB OTG/host operation.
- USB-A flash drives, keyboards, mice, receivers and card readers within the host’s power and software limits.
- Printers, scanners, audio/MIDI devices, cameras and controllers when the host OS or app supports their USB class/model.
- USB 3.x peripherals at up to 5Gbps theoretical and older USB devices at their negotiated lower rate.
- Externally powered USB devices and powered hubs that keep within normal USB topology rules.
- External HDDs/SSDs only when the host can supply enough current or the storage device/hub has an appropriate separate power source.
Capabilities
What this product does
- Adapts one USB-C host connection to one USB-A female data port.
- Lets a compatible OTG-capable phone or tablet control supported USB peripherals.
- Carries USB 3.0 data at up to 5Gbps theoretical on a complete compatible chain.
- Passes ordinary USB bus power available from the host to the connected peripheral.
- Supports lower-speed USB devices through normal backward negotiation.
- Provides a flexible short connection that reduces rigid-port leverage.
Clear boundaries
What this product does not do
- It does not provide USB-C Power Delivery input/output or fast-charge negotiation.
- It does not output HDMI, DisplayPort or video to a monitor from its USB-A socket.
- It does not add Ethernet, audio, SD/microSD, additional ports or independent hub bandwidth.
- It does not turn a peripheral-only USB-C port into a host or add OTG support to incompatible hardware.
- It does not guarantee a phone/tablet can power a mechanical HDD, capture card or other high-draw peripheral.
- It does not install device drivers, unlock encrypted storage or add unsupported filesystems.
- It is not intended as a phone/laptop charging adapter; data use is the verified purpose.
Good practice
What to do
- Confirm the USB-C port supports data and host/OTG mode before buying for a phone or tablet.
- Test demanding peripherals through a direct computer connection and use proper separate power where their manual permits it.
- Support the adapter and peripheral cable so their combined weight does not pull on the USB-C port.
- Install device-specific drivers/apps and grant the necessary operating-system permissions.
- Eject storage and close active files before disconnecting.
- Keep both connector interiors dry and free of lint, and insert plugs straight.
Avoid these mistakes
What not to do
- Do not use it as a USB-C laptop charger, Power Delivery trigger or fast-charge converter.
- Do not expect a monitor to work through a USB-A video cable or passive HDMI adapter.
- Do not force a loose or obstructed connector, hang a heavy device from the host port or sharply bend the cable.
- Do not assume every Android/iOS app recognises every controller, audio device or storage format.
- Do not attach several high-draw devices through an unpowered hub and expect the phone or tablet to supply them.
- Do not disconnect storage while files, backups or firmware operations are active.
Important safety and performance notes
Warnings and limitations
Mobile USB-C ports can look identical while providing different roles, data rates and power budgets. Check the exact host specification.
- USB-A female is a downstream peripheral connection; never attempt to join two computers with an A-to-A cable through this adapter.
- A phone can report a drive connection and then drop it under load if startup current exceeds the port’s power budget.
- Real 5Gbps operation needs a USB 3.x host and device. Blue plastic or connector shape alone is not proof of the negotiated link.
- Filesystem support differs by operating system. Formatting on one platform can make a volume unreadable on another.
- Storage corruption can result from pulling the adapter before writes complete. Always unmount where the host provides that command.
- Use a certified powered hub or the device’s own supply for high-current hardware; do not inject power from improvised cables.
- Stop using the adapter if a connector becomes loose, unusually hot, corroded or intermittent.
Keep it working and solve common issues
Care, troubleshooting and buying checklist
A simple low-power USB device is the best diagnostic tool because it separates host/OTG support from storage power and filesystem issues.
- Nothing detected: verify the USB-C port supports host data, reverse the USB-C plug, reseat both ends and test a keyboard or flash drive.
- Drive lights but does not mount: inspect the system disk utility and check filesystem, encryption and permissions without formatting needed data.
- HDD repeatedly disconnects: the host may not supply enough power; use a properly powered storage device or compatible powered hub.
- Transfer is slow: confirm the peripheral and host are USB 3.x and avoid a USB 2.0 hub, cable or device in the route.
- Controller or audio device ignored: check the exact app/OS accessory support and any required permission or class driver.
- Monitor shows no picture: this is expected; the adapter has no display output function.
- Buying check: verify host-mode USB-C, one USB-A peripheral, required power, desired data rate and software support.
Exact-model details
Technical specifications
In the box
Package contents
The exact product is a single connector adapter. Peripherals, hubs, chargers and host devices in illustrations are examples and are not part of the package.
- 1 × UGREEN 30701 USB-C to USB-A 3.0 OTG adapter
- 1 × user documentation set where supplied
- USB peripheral, powered hub, charger, phone, tablet and computer are not included
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Product-specific FAQ
Model verification
Research and source note
This exact-model guide was reconciled against live Shopify product gid://shopify/Product/7438743928931, its attached UGREEN-owned Shopify CDN media, and the UGREEN India model page at https://www.ugreenindia.com/products/ugreen-usb-c-male-to-usb-3-0-a-female-adapter-type-c-otg-cable-compatible-for-macbook-pro-2019-2018-samsung-galaxy-s10-s9-s8-note-9-8-lg-v40-v30-g6-google-pixel-2-xl-etc-30701.
Connector direction, protocol, power path and drive form factor are stated separately so a similar-looking socket is not mistaken for a different function. Performance figures are interface ceilings, not guaranteed file-copy rates.
Only claims supported for this exact SKU are retained. Related-model artwork, uncertain capacity or length claims, and unsupported promises about charging, display output, hot swapping, RAID, booting or operating-system behavior are left out.
- Compatibility examples are kept conditional on host/OTG mode, device class, power and filesystem support rather than treated as universal.
- Charging and display-output language is excluded because the exact adapter is a USB data-peripheral bridge.
- Seven unique exact-SKU Shopify images are used as large single contextual figures with no repeated thumbnails.
