SanDisk SDDR-409
SanDisk SDDR-409
Type
Dongle
Max Speed
UHS-II (312 MB/s)
Interface
USB-C
Price Tier
$
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Who Is This For?
SanDisk's trusted reliability combined with full UHS-II speeds at a reasonable price point.
Pros & Cons
Pros
- ✓Unlocks full UHS-II speeds
- ✓Trusted brand reliability
Cons
- ✗Design can block adjacent ports on some hubs
Full Specifications
| Brand | SanDisk |
| Model | SDDR-409 |
| Type | Dongle |
| Interface | USB-C |
| Supported Slots | SD UHS-II |
| Max Speed | UHS-II (312 MB/s) |
| Transfer Rate | High Speed |
| Price Tier | Mid-Range |
Device Compatibility
Works With
MacBook Pro, PC Laptops, iPad Pro
OS Support
macOS, Windows
Frequently Asked Questions
What are the real UHS-II transfer speeds for the SanDisk SDDR-409?
Real-world transfer speeds are 250-290 MB/s with UHS-II cards on MacBook Pro and Windows laptops. Theoretical max is 312 MB/s. Speeds vary by card quality and USB port type.
Does the flexible cable design block adjacent USB-C ports?
Yes, on compact USB hubs. The SDDR-409 is wider than standard USB-C adapters and can block nearby ports on tight port arrangements. Use spaced-out hubs or direct Mac connection.
Can I use the SanDisk reader with iPad Pro for photo import?
Yes, iPad Pro (2018+) with USB-C supports this reader. iPad photo imports reach 80-120 MB/s due to iPadOS file system constraints, even though the reader supports 312 MB/s.
Is the SanDisk Extreme PRO reader backed by warranty?
Yes, SanDisk includes a 5-year limited hardware warranty covering manufacturing defects. Coverage does not include physical damage or water exposure.
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Based on our compatibility testing, the SanDisk Extreme PRO SD UHS-II Reader works excellently with: