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Ugreen  |  SKU: 30333
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UGREEN 30333 USB 3.0 4-in-1 SD/TF/CF/MS Card Reader, 0.5m

Rs. 1,299.00 Rs. 2,605.00
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Blazing Speed
Universal Compatibility
Instant Access
Compact & Durable
Multi-Card Power
SD • TF • CF TYPE I • MS • FOUR-CARD ACCESS

UGREEN 30333 USB 3.0 4-in-1 SD/TF/CF/MS Card Reader, 0.5m

Overview

UGREEN 30333 is a desktop-friendly USB-A 3.0 reader with four separate card-family slots. This exact-model guide separates connector bandwidth from real card performance and explains every important compatibility boundary before you move valuable files.

SKU 303331 × SD; 1 × microSD/TF; 1 × CompactFlash Type I; 1 × Memory StickUHS-I-class SD performance up to about 104MB/s is stated in official regional material; CF and MS performance depends on the card technology.
UGREEN 30333 USB-A 3.0 four-slot reader with SD, microSD, CompactFlash Type I and Memory Stick media
USB-A 3.0 four-slot reader with SD, microSD, CompactFlash Type I and Memory Stick media

Key features

Reader role

a desktop-friendly USB-A 3.0 reader with four separate card-family slots.

Host connection

integrated USB-A 3.0 cable, approximately 0.5m / 19.5 inches.

Card layout

1 × SD; 1 × microSD/TF; 1 × CompactFlash Type I; 1 × Memory Stick.

Practical speed

UHS-I-class SD performance up to about 104MB/s is stated in official regional material; CF and MS performance depends on the card technology.

Model check: Similar-looking UGREEN readers can differ in host plug, card protocol, simultaneous access, extra USB ports and charging. Match SKU 30333 rather than buying by appearance alone.

Ports, slots and connection map

Host side: integrated USB-A 3.0 cable, approximately 0.5m / 19.5 inches.

Reader and accessory side: 1 × SD; 1 × microSD/TF; 1 × CompactFlash Type I; 1 × Memory Stick.

Extra function: Blue LED indicates connection/activity. The long cable reduces strain and avoids blocking adjacent ports.

Direction rule: A card reader is a host accessory. It must connect to a device that can act as a USB host; connecting two accessories together does not create a host.

UGREEN 30333 Approximately 19.5-inch integrated cable arranged to avoid blocking nearby host ports
Approximately 19.5-inch integrated cable arranged to avoid blocking nearby host ports

Speed explained without the marketing blur

USB/interface ceiling

Up to 5Gbps USB 3.0 signalling, backward compatible with slower USB modes.

Memory-card ceiling

UHS-I-class SD performance up to about 104MB/s is stated in official regional material; CF and MS performance depends on the card technology.

UHS generation

UHS-I workflow. A UHS-II SD card may be accepted only at the reader/card mode actually negotiated; no UHS-II speed claim is made.

Real-world result

The slowest link wins: card, slot mode, reader controller, host port, file system, thermal state, file sizes and simultaneous activity all matter.

Never equate 5Gbps or 10Gbps with card speed. USB values describe theoretical link signalling. SD and microSD media usually operate at much lower sustained rates, and many small files transfer more slowly than one large sequential file.

UGREEN 30333 5Gbps USB 3.0 interface artwork; sustained card transfers remain limited by the installed media and slot mode
5Gbps USB 3.0 interface artwork; sustained card transfers remain limited by the installed media and slot mode

Card formats, capacity and file systems

Supported card families

SD, SDHC, SDXC, MMC/RS-MMC; microSD/TF, microSDHC, microSDXC; CompactFlash Type I; compatible Memory Stick/PRO families.

Capacity boundary

Official UGREEN regional copy states up to 512GB, while exact live Shopify artwork says up to 2TB. This conflict is disclosed and the conservative 512GB verified ceiling is used for purchase guidance.

File-system caveat

The card must use a format the host understands. exFAT is common for large removable media; FAT32 has file-size limits; NTFS and vendor-specific formats may not mount on phones/tablets.

Write-protect reminder

A full-size SD card with its lock tab engaged may be readable but not writable. The reader cannot override the card's mechanical write-protect state.

UGREEN 30333 Four labelled card-family slots with CF Type I and Memory Stick compatibility boundaries
Four labelled card-family slots with CF Type I and Memory Stick compatibility boundaries

Simultaneous access and shared-resource behaviour

The exact UGREEN gallery and regional product copy support reading and writing all four installed cards at the same time. Total bandwidth is shared.

Shared bandwidth

Two cards or attached peripherals divide the bandwidth available through the single host connection.

Shared power

Bus-powered readers and USB peripherals depend on host power. High-draw drives may disconnect or fail to mount without an appropriate powered path.

Copying card-to-card

The computer or mobile host mediates the copy. The reader is not an autonomous duplicator and does not copy files when disconnected from a host.

Safest workflow

For irreplaceable media, copy one card, verify the files, create a second backup and only then erase or reformat the original.

UGREEN 30333 Exact four-card read/write workflow using all supported card-family slots together
Exact four-card read/write workflow using all supported card-family slots together

Compatible devices and systems

Compatible device class: desktop and laptop computers with a USB-A host port.

Operating systems: Windows, macOS, Linux and ChromeOS with USB mass-storage support..

Mobile rule: Direct phone/tablet use is not the intended path. A separate powered/OTG adapter may still face host, file-system and power limits.

USB-C is only a shape

A USB-C port can be charging-only, data-capable, OTG-capable or video-capable. Confirm the exact host function.

Apps and permissions

On phones/tablets, use Files, Photos or the manufacturer's supported file manager and allow removable-storage access when prompted.

Cases and clearance

A thick case can prevent full plug insertion. Remove it temporarily rather than forcing the connector.

Managed devices

Corporate policy, encrypted cards or restricted mobile profiles can block removable media even when hardware is compatible.

UGREEN 30333 Driver-free USB mass-storage compatibility artwork for Windows, macOS, ChromeOS and Linux
Driver-free USB mass-storage compatibility artwork for Windows, macOS, ChromeOS and Linux

Use scenarios

Scenario 1

Recover photos from legacy CF Type I cards.

Scenario 2

Import SD and microSD camera media.

Scenario 3

Read Memory Stick media from older devices.

Scenario 4

Access four supported card families in one desktop workflow.

UGREEN 30333 Compact travel carry for photographers; valuable cards still require a second verified backup
Compact travel carry for photographers; valuable cards still require a second verified backup

Setup and usability guidance

  1. Confirm SKU 30333, the required host connector and the exact card format before insertion.
  2. If using a phone or tablet, enable or confirm OTG/USB-host storage and make sure the battery has enough charge.
  3. Insert the memory card straight into its matching slot in the orientation shown by the slot label. Never force it.
  4. Connect the reader to the host. Wait for the removable volume to appear in Files, Finder, File Explorer or the supported mobile app.
  5. Copy a small test file first. Then start the main transfer and keep the device, cable and cards still.
  6. Verify copied folders, file counts and several representative files before treating the transfer as a backup.
  7. Use Eject or Unmount, wait for activity to finish, then disconnect by the connector housing rather than the cable.

What this product does

  • a desktop-friendly USB-A 3.0 reader with four separate card-family slots.
  • Provides 1 × SD; 1 × microSD/TF; 1 × CompactFlash Type I; 1 × Memory Stick.
  • Works within the documented speed and compatibility limits.
  • Supports the stated host and card families when the operating system can mount them.

What this product does not do

  • not for CompactFlash Type II, CFast, CFexpress, XQD, UHS-II speed, charging, video output or data recovery.
  • It does not repair corrupted media, recover deleted files or guarantee that damaged cards will mount.
  • It does not make one copy into a backup; keep another verified copy on separate storage.
  • It does not guarantee every illustrated device, card capacity or speed without the required host capability.

What to do

Do: label cards

Separate blank, active and backed-up cards. Locking or labelling completed media prevents accidental erasure.

Do: verify before erasing

Open several copied files and compare counts or checksums for critical work.

Do: keep connectors clean

Use a dry, dust-free environment and store the reader where slot contacts are protected.

Do: eject safely

Unmount every active volume and wait for activity to stop before removal.

What not to do

Do not: remove during writing

Disconnecting during import, deletion, formatting or metadata updates can corrupt the file system.

Do not: force media

Wrong orientation or the wrong card family can bend contacts or crack the card.

Do not: format the wrong disk

Confirm the volume name, capacity and path before erase or format operations.

Do not: trust one copy

Portable cards fail, get lost and can be overwritten. Maintain a separate verified backup.

Warnings and limitations

Heat and moisture: keep the reader dry and ventilated. Mild warmth during sustained transfer can be normal; disconnect if there is unusual heat, smell, deformation or repeated resets.

Power: Blue LED indicates connection/activity. The long cable reduces strain and avoids blocking adjacent ports.

Card handling: do not touch contacts, bend cards, use cracked adapters or insert nested adapters that do not fit cleanly.

Formatting: formatting deletes the file-system index and can make recovery difficult. Back up first and confirm the target device's preferred format.

Critical data: no reader can guarantee recovery from failing media. Stop repeated write attempts on a card showing errors and seek professional recovery help if the files are irreplaceable.

Technical specifications

Brand / SKU UGREEN 30333
Product role a desktop-friendly USB-A 3.0 reader with four separate card-family slots
Host connection integrated USB-A 3.0 cable, approximately 0.5m / 19.5 inches
Slots / ports 1 × SD; 1 × microSD/TF; 1 × CompactFlash Type I; 1 × Memory Stick
Simultaneous behaviour The exact UGREEN gallery and regional product copy support reading and writing all four installed cards at the same time. Total bandwidth is shared.
Interface ceiling Up to 5Gbps USB 3.0 signalling, backward compatible with slower USB modes.
Card performance UHS-I-class SD performance up to about 104MB/s is stated in official regional material; CF and MS performance depends on the card technology.
UHS/card mode UHS-I workflow. A UHS-II SD card may be accepted only at the reader/card mode actually negotiated; no UHS-II speed claim is made.
Card formats SD, SDHC, SDXC, MMC/RS-MMC; microSD/TF, microSDHC, microSDXC; CompactFlash Type I; compatible Memory Stick/PRO families.
Capacity/file-system note Official UGREEN regional copy states up to 512GB, while exact live Shopify artwork says up to 2TB. This conflict is disclosed and the conservative 512GB verified ceiling is used for purchase guidance.
Operating systems Windows, macOS, Linux and ChromeOS with USB mass-storage support.
Build black compact reader body, integrated USB-A cable, four labelled slots and blue status LED
Approx. dimensions Approx. 68 × 55 × 15mm body; cable about 0.5m
SKU 30333
Host connector USB-A 3.0 male on integrated cable
USB ceiling Up to 5Gbps
Slots SD; microSD/TF; CF Type I; Memory Stick
Simultaneous access Up to four supported cards
SD speed class UHS-I; up to about 104MB/s stated
Conservative capacity ceiling Up to 512GB using the official regional specification
Cable length Approx. 0.5m / 19.5 inches
CF limitation Type I only; not CF Type II

Troubleshooting

Card does not appear

Reseat the card and reader, confirm slot orientation, test one card at a time, remove an obstructing case and check OTG/file-system support.

Card is read-only

Check the SD lock tab, operating-system permissions, card health and whether the file system was mounted read-only after errors.

Transfer is slower than expected

Use one card, a direct high-speed host port and large sequential files; confirm the card's own sustained rating and negotiated UHS mode.

Reader disconnects

Remove high-power USB peripherals, connect a suitable PD/powered path where this exact model supports it, and avoid loose extensions.

Phone cannot see files

Use the Files/Photos app, enable OTG, grant storage permission and verify the card uses a phone-supported format such as exFAT/FAT32.

Copied file will not open

Compare the original, copy again to a different destination and stop using a card that reports I/O, CRC or corruption errors.

Package contents

1 × UGREEN 30333 4-in-1 USB 3.0 card reader

Memory cards, phone, tablet, computer, camera, charger, external drive and other illustrated accessories are not included unless explicitly named above or in the selected offer.

Research and media reconciliation

Current live artwork says 2TB, while official regional specifications say 512GB. The 2TB slide is excluded from the description media and the conservative official 512GB ceiling is disclosed. Exact media confirms four-card simultaneous operation and CF Type I—not CF Type II.

Visual-media decision: Seven of eight exact images are used once. The conflicting 2TB slide is excluded and disclosed; retained artwork verifies the four slot families, four-card simultaneous operation, desktop cable layout and broad computer support.

Excluded exact-media slide: Excluded because the live artwork claims up to 2TB while official exact-model regional specifications support the conservative 512GB ceiling used in this guide.

Research method: exact live Shopify product record and gallery were visually reviewed, then claims were checked against exact-SKU UGREEN India or official UGREEN regional pages. Duplicate, corrupted or conflicting artwork was documented and not embedded.

Source discipline: no UHS-II, capacity, speed, simultaneous-access or charging claim was inferred from slot shape, connector colour or a related product family.

Product-specific FAQ

What exactly is UGREEN 30333?

a desktop-friendly USB-A 3.0 reader with four separate card-family slots.

Which host connection does it need?

integrated USB-A 3.0 cable, approximately 0.5m / 19.5 inches.

Which card slots or ports are provided?

1 × SD; 1 × microSD/TF; 1 × CompactFlash Type I; 1 × Memory Stick.

Can it access more than one card at a time?

The exact UGREEN gallery and regional product copy support reading and writing all four installed cards at the same time. Total bandwidth is shared.

Is 5Gbps the actual card speed?

No. Up to 5Gbps USB 3.0 signalling, backward compatible with slower USB modes. UHS-I-class SD performance up to about 104MB/s is stated in official regional material; CF and MS performance depends on the card technology.

Does it support UHS-II speed?

UHS-I workflow. A UHS-II SD card may be accepted only at the reader/card mode actually negotiated; no UHS-II speed claim is made.

What card formats and capacities can I use?

SD, SDHC, SDXC, MMC/RS-MMC; microSD/TF, microSDHC, microSDXC; CompactFlash Type I; compatible Memory Stick/PRO families. Official UGREEN regional copy states up to 512GB, while exact live Shopify artwork says up to 2TB. This conflict is disclosed and the conservative 512GB verified ceiling is used for purchase guidance.

Will it work with a phone or tablet?

Direct phone/tablet use is not the intended path. A separate powered/OTG adapter may still face host, file-system and power limits.

Which file system should I use?

Use a format supported by both the host and destination device. exFAT is common for large removable media; FAT32 has a 4GB single-file limit; NTFS often fails on phones/tablets.

How should I remove a card safely?

Finish every transfer, close apps using the volume, choose Eject or Unmount, wait for activity to stop, then remove the card and reader without pulling the cable.

What is included in the package?

1 × UGREEN 30333 4-in-1 USB 3.0 card reader.

Final exact-model check

Confirm SKU 30333, integrated USB-A 3.0 cable, approximately 0.5m / 19.5 inches, and 1 × SD; 1 × microSD/TF; 1 × CompactFlash Type I; 1 × Memory Stick. Then match the UHS mode, capacity, simultaneous-access rule and mobile/charging requirements before ordering.

SKU 30333UHS-I workflow. A UHS-II SD card may be accepted only at the reader/card mode actually negotiated; no UHS-II speed claim is made.Official UGREEN regional copy states up to 512GB, while exact live Shopify artwork says up to 2TB. This conflict is disclosed and the conservative 512GB verified ceiling is used for purchase guidance.

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