It is a really good brand and it is very fast. i used it to transfer a large files and it takes few seconds to transfer 10GB.

Holds a lot of space and is very small and compact.

The SanDisk - Extreme Pro 256GB USB 3.1 Flash Drive - Black is very fast! I now own two of these and I am always using them at home and at work. I would highly recommend the SanDisk - Extreme Pro 256GB USB 3.1 Flash Drive - Black. Keep in mind that at the time of this posting BestBuy price matches against other online retailers. This can save money as other retailers may throw this on sale more often. Spec wise: I work in IT and I must say I really like the construction of the USB device. Please note that if you have a small work surface this USB device does stick out just a tad longer than most USB flash drives. The metal construction of it though makes it ideal for keeping it in your pocket so as long as one remembers it is in their pocket. Warranty: Lifetime Warranty! Keep this in mind as most USB flash drives do not offer this type of warranty. With this being said, please don't forget to register the warranty when you first get it as it would make the process easier should something happen later down the road. So as long as your careful with the flash drive you shouldn't have any issues. Note: This flash drive is backwards compatible with USB 3.0, 2.0 etc. However, the speeds of the USB flash drive will depend on what type of USB slot you currently have the USB in -results will vary based on hardware used. All in all I'm trilled with this purchase! I got this USB flash drive on a great sale. Keep your eyes out on other retailers and have BestBuy price match it for you. You will really like your new purchase!

Great purchase. Super fast! Never have issues with this one.

Transferring a 9GB 1080p movie file On my 2020 laptop I get around 380 MB/s Read Speed and 320 MB/s Write Speed. That is with a Western Digital SN730 SSD and a Intel i7-10750H. Both 3.2 Gen1 and 3.2 Gen2 ports produced the same speeds. On my old PC from 2010 with a Samsung HDD and i7-2600K I get about around 100 MB/s Read/Write Speed via USB 3.0 and 20MB/s via USB 2.0 Obviously speeds will vary depending on system, hardware integrity and the such but you likely wont reach speeds of 420/380. Something like 350/300 is what you should probably expect and thats still plenty fast. Comes with SecureAccess on the drive to protect your files in a "vault" but you dont have to use it, nor do you get a prompt to. Also comes with a 1 year code for RescuePRO that you can download, allows you to recover deleted files. Plugs right into my Sony Bravia and plays/fast forwards all 1080p content perfectly. I dont have any 4K digital movies to test. Make sure to price match, as it can be found much cheaper than on BestBuy.com