Here is the comparison between cloud storage vs. a USB thumb drive.
Below is the list of a general specification of a Usb thumb drive (which may deviate from the specification of different country).
1. Compatibility & Interface
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USB Interface Type
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Dual-interface:
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USB-A + Micro-USB (for older Android devices)
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USB-A + USB-C (for modern Android and tablets)
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USB-C + Lightning (for iPhone and iPad Pro)
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USB Standard: USB 3.0 / 3.1 Gen 1 / 3.2 Gen 1 (faster read/write) or USB 2.0 (slower, cheaper).
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OTG Support
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Must support USB OTG to directly connect to smartphones without extra apps (though some proprietary apps may be required for iOS).
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2. Storage Capacity
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Common sizes: 16GB, 32GB, 64GB, 128GB, 256GB, 512GB, and up to 1TB.
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For 4K video and high-res images, 128GB+ is recommended.
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Check actual usable space (some capacity is reserved for formatting).
3. Data Transfer Speed
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Read speed: Typically 80–420 MB/s (depends on interface and NAND type).
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Write speed: Typically 15–200 MB/s.
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Faster drives often use USB 3.2 and solid-state-grade flash memory.
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Note: Speeds can drop on mobile due to device limitations.
4. File System
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FAT32: Most compatible, but max file size is 4GB.
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exFAT: Best for large files (>4GB), works with most modern devices.
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NTFS: Works with Windows but may need special apps for Android/iOS.
5. Build & Design
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Material: Plastic (lightweight), aluminum (durable, heat dissipation), zinc alloy (premium feel).
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Swivel cover or sliding connector for protection.
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Mini keyring hole for portability.
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Capless design to prevent losing covers.
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360° rotating connector for dual-interface models.
6. Additional Features
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Password protection & encryption: AES 128/256-bit for security.
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App integration: Manufacturer apps for backup, file management (e.g., SanDisk Memory Zone, iXpand Drive).
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Automatic backup: Photos, videos, contacts.
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LED activity indicator: Shows transfer in progress.
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Waterproof / Shockproof / Dustproof: For durability.
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Heat resistance: Ensures stable operation during long transfers.
7. Dimensions & Weight
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Length: ~30–70 mm
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Width: ~12–20 mm
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Thickness: ~5–10 mm
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Weight: 5–20 grams (varies by material and design)
8. Power & Operating Environment
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Power supply: Draws directly from smartphone or PC, no battery needed.
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Operating temperature: 0°C to 60°C (32°F to 140°F).
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Storage temperature: -20°C to 85°C (-4°F to 185°F).
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