The most typical and common color for USB 3.0 ports is blue. This is a widely adopted industry standard for identification. Whether it’s the USB Type-A ports on computer hosts, the ports on external docking stations, or the ports on USB flash drives themselves, blue has become the core visual feature of USB 3.0, enabling users to quickly distinguish it from traditional ports.
However, there are a few exceptions: some brands may opt for black or white USB 3.0 ports to align with their product’s overall design aesthetic. Such instances are relatively rare, and these ports typically feature text labels like “USB 3.0” or “SuperSpeed USB” nearby to prevent confusion with USB 2.0 ports (which are often black or white).

Compatible, but speed will be limited:
Port compatibility: USB 3.0 is backward/forward compatible. When plugging into a USB 4.0 port (typically Type-C form factor), a “USB-A to Type-C adapter” is required, but actual transfer speeds will be capped at the USB 3.0 limit (5Gbps).
Note: If the flash drive has a Type-C port but uses USB 3.0 (e.g., mini Type-C flash drives), it can be plugged directly into a Type-C port for more stable compatibility without needing an adapter.

Troubleshoot using these steps:
First, try a different port / computer: Switch to another USB 3.0 port, or test on a different computer to rule out port issues;
Check drivers: Right-click “This PC” → ‘Manage’ → “Device Manager”. Verify if “Universal Serial Bus controllers” displays a yellow exclamation mark. If present, update USB drivers;
Diagnose hardware issues: If multiple computers fail to recognize the drive, it may indicate a loose USB port connection or damaged chip. Contact customer service or replace the USB drive.

USB drive manufacturers have minimum order quantity requirements, typically ranging from 100 to 200 units. However, smaller batch custom orders are negotiable:
Larger batches result in lower unit costs (e.g., orders under 200 units may incur a 10%-20% higher unit price), making them ideal for corporate gifts, promotional events, and similar scenarios.