Review on SanDisk Ultra Fit USB 💾 3.1 Flash Drive - 256GB Capacity (SDCZ430-256G-G46) by Ricky Khan

We've used the ancestor of these ultra-thin drives for years as an easy way to add always-on storage to your MacBook Pro (any USB 3.0+). Just plug in, format and forget. They have always done a great job and always performed well. We have just ordered 3 copies of this new model (256GB) and have experienced very slow write speeds. If you check the system profiler you can easily see that the old model registered full speed every time it was plugged in, but this new model often goes back to USB 2.0 speeds. We tested all three drives and all three do. If we didn't need 256GB of storage in a tiny form factor, we'd be returning all three. As it stands, the performance issue isn't really going to be a big issue (they tend to contain a lot of relatively small files), but if you're counting on USB 3.0's dependable speeds, you might want to look elsewhere.