I haven't synced them and I don't regularly transfer large amounts of data, but they're fast enough that I don't realize what's good. I use them to create bootable Linux ISO disks, so they've been formatted and reformatted many times when installing distros and haven't had any problems. I found them to be a better price than the 4GB packages, which were around 6.0GB a few months ago. Also, the super cheap drives I've bought in the past haven't been reliable or durable, so I should pay a little more. I recommend this product. The only slap I have is the caps I lose. But I'm just picky
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