SanDisk Extreme PRO 128GB Review

👤by David Mitchelson Comments 📅30-05-14
Testing Methodology

Test Setup

USB 3.0

The Maximum theoretical bandwidth of USB 3.0 is 5Gbps (625 MB/s); under the most common data encoding parameters this figure drops to ~400MB/s, still dwarfing the spec limits of the majority of USB 3.0 thumb drives. Though the absolute maximum data transfer rate for the drive under reasonable conditions is generally of primary importance, it's also sensible to monitor sequential performance which is regarded much more rigorous.

Up against the SanDisk ExtremePro we have Samsung’s S2 Portable 3 – another USB 3.0 flash drive. This comparison helps to demonstrate how a reliable, popular and affordable USB 3.0 drive competes against SanDisk’s latest storage device.

Testing Notes:-

1. Poorly configured or malfunctioning USB 3.0 ports may not recognise USB 3.0 devices, but still work in USB 2.0 mode for USB 2.0 devices. Do not assume that the drive is at fault if this occurs, especially if other USB 3.0 devices have yet to be tested.

2. For reasons unknown, some USB 3.0 ports may be limited to ~135MB/s read/write operation. Though not an issue for most drives, external USB 3.0 SSD enclosures and flash drives which are capable of greater speed will suffer.

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