Wow, was I impressed. I expected to get 4MB/sec, and instead, when copying a big file to the device, it wrote out at nearly 10MB/sec. Read speed was 20MB/sec. I was using this in an elago Mobile Nano II which fits flush in my laptop's USB port so I never have to remove it. Since this is a microSDHC, you can only format these with FAT32, but that's just fine since NTFS is about 6X slower on USB sticks so you'd never want to format flash memory with NTFS anyway! So I use 4GB for ReadyBoost on Windows 7 (which is the most you can do for 4GB) and use the other 4GB for file storage for stuff I'm actively working on. I couldn't be happier with the combination of this card and the elago adapter. This is the ideal solution if you want to add ReadyBoost to your laptop. You simply cannot beat it!
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