Very fast transfer speeds, but the size and rigidity of it was very inconvenient

Extremely fast speed and has performed flawless so far

Speed has also been excellent, in a pinch I can copy an ISO to them (or even run a small VM) with no issue.

Read-speeds exceed what's promised (seeing as high as 260MB/s).Highly recommended

I love this USB drive, i transfer files from usb 3.0 port up to 110 mb/sec, better speed than transfering files between HDD partitions

As someone who has never had the pleasure of using USB 3.0 until very recently, I LOVE this thing.64GBs of space AND blazing fast speeds for $35 is not a bad

very fast speed, and

Excellent speed.

Great price, great speed.

Excellent upload and download speed

I have several 64gb drives and they work as advertised, average write speed well above 220MB/sec speed, read tends to be

Never match speeds on the box lol, but faster than almost every other drive of the same size I've ever tested

Sometimes write speed hits around 102, but hugely consistent with advertised speed

The speeds for the 64GB model reach the advertised speed and sometimes exceed it depending on the file size

The 64GB version has the fastest write speeds with slower speeds as they get smaller

, otherwise the speed would be limited at ~30MB/s only.

Awesome flash drive, great speed

Am astonished by its performance, it gives my up to 190mb as write speed for large single files, and starts at 100mb for large sequencial files like a season of a show

It may be capable of ever faster speeds; however, these were the speeds I observed

Fast write speeds and cheap at the price I got them, what's not to like?

Great speeds, as suggested by the other reviews that did the tests

So although this would be the perfect USB drive otherwise, I'm giving this product a poor rating--fantastic capacity and speed mean nothing if you cannot connect the unit.

Great drive, good speeds

Great speeds and very reliable

Amazing speeds

nice fast transfer speeds.

Great speed for the price.

Very good speeds

*snick*.The speed is phenomenal when paired with a device with high speed internals.

The speed of USB 3.0 is fast.

Excellent read / write speeds, good case design and size

So you buy this SanDisk Extreme Flash Drive because it has good speed and good ratings and it's a price you are willing to pay

Tested with 2GB transfer on a MacBook Pro, and the promised write-speeds are achieved (~100MB/s)

I already loved the speed of this

3.0 speeds are so much better than 2.0

it's worth it if you want greasy fast speed in a thumb drive form factor.

Of coarse fast Speed in a Thumb drive doesn't really matter that much unless your talking about a Drive that is at least 65Gb or more and the files you'll be putting On and Off the drive are of considerable size, if not than the speed is not worth considering, and not worth spending more money on than a average speed drive.

The speed just 30MB/s, much slower.

I'm sure the speed of this drive is complete overkill but what the heck, I got it anyway

amazing speed

I wanted the read speed and it didn't disappoint!

The larger the drive, the faster the transfer speeds

It may have great speeds but as other people have said the build quality is poor

This write is 190M, read is 250M, the speed is very satisfactory, but I bought it is because it can be used WTG (TO GO WINDOWS), but it is a pity that no longer is the local disk, and can not use WTG, a friend can be used to buy WTG, but now 15 years can not, regret buying.

Fantastic speed

Best speed flash drive for the money.

Very fast write speeds.

I bought this item in November of 2014 and now in April 2015 the USB speed is slower than USB 2.0

I have transfered data to and from and love the great speed it provides.

Works great, good speed

Good price, good speed.

But I am using this drive off my TM-AC1900 router where the USB performance is better than the horrid 3.0 ports on the Dell, and getting similar results to the Dell's one decent high speed USB 3.0 port.

The speed is unbelievable!!

Amazing burst speeds, but inconsistent performance across the drive

I used to spend time buying cheaper drives that had such poor write speeds (but you only find that out when you test them) as most manufacturers post read speeds only.

I wish it had a metal shell, but for the price the speed and capacity are excellent.

You'll see that amazing speed only on single files.

it has a fantastic speed

Fast write speed, great stuff

great product with fast speeds

Stated speed is optimistic to the point of being misleading for real world use, but it's still my fastest flash drive.

speed is appreciated.

Good speed and stable

it's worth it if you want greasy fast speed in a thumb drive form factor.

Of coarse fast Speed in a Thumb drive doesn't really matter that much unless your talking about a Drive that is at least 65Gb or more and the files you'll be putting On and Off the drive are of considerable size, if not than the speed is not worth considering, and not worth spending more money on than a average speed drive.

The speed is nice as well

Fast speed

Good speed, easy for my Daughter to use

Amazed how fast the 3.0 speeds are.

Fantastic speed for the money!

I ultimately bought a Rosewill RC-508, and it works perfectly with it and at very good speeds (see attached photo)

Quality build construction but speed is a huge negative.

It delivers great speeds and has many storage options

This is a fairly big stick but the speed of it is well worth the money

It is a very high quality flash drive with amazing speed

It's simply not worth buying the super cheap drives that have slow transfer speeds

Write speed is a bit low compared to other results, but still way faster than any other flash drive I have tried.

I had a SanDisk 3.0 that I bought from walmart for a bit cheaper, but the speed was much slower

The drive might be a tad larger than some other flash drives, but the speed is several times faster than my other value-priced models

The speed kills, and as always rock solid functionality and performance from Sandisk.

I need a USB drive to copy lots and lots of small files between 2 computers, which necessitate fast random write speeds.

excellent speeds compared to even a 2 yr old usb 3.0 drive

Good transfer speeds

Super fast write speeds are absolutely noticeable.

Good Brand Name, Warranty and very Fast Speed, this is a Good Place to put your money into

Great speed

USB 3 speeds are awesome

Great price, great speed.

If you need a flash drive to back up data, a fast write speed is a huge benefit

I did not want to deal with lost information or suffer slow transfer speeds

Blindingly fast speed

Fast speed

very fast transfer speed

So although this would be the perfect USB drive otherwise, I'm giving this product a poor rating--fantastic capacity and speed mean nothing if you cannot connect the unit.

Since then, it has slower write speeds and cannot be recognized by my car's new pioneer system.

With the Ultra CZ48 the write speeds are much slower than the read speeds (only 7%-25%)

Works great and fast transfer speeds

Very high-speed, these drives have been fail safe or multi-track recording on my Allen & Heath mixers

The 64GB version has the fastest write speeds with slower speeds as they get smaller

Simply works as stated fast shipping and great transfer speeds

And the speed is great.

Write speed over 100MBRead speed over 100MBI like it and happy because I bought it ☺

This had great speed for loading onto the drive and was immediately responsive when plugged into the USB port in my car

Love the space and speed, too

I searched for the fastest write speed USB here on Amazon and this came up

Not a bad drive but there are better drives that are newer, better build quality, and faster R/W speed.

Nice speed, but I don't like the sliding mechanism

It is a little bigger than I would like but the speed and the size, I'll compromise

The speed seems good.

Read speed not so good.

amazing speed.

This drive provides pleasantly fast speeds that will transfer large files or a large group of small files at speeds that will make you smile once you see the transfer rate

Great speeds as advertised, high capacity and durable feeling case with smooth retracting action

Pros:Best overall speeds for any USB drive, on par with a slow SSD.Cons:Don't like the flip in and out mechanism at all; creates point of mechanical weakness

Great quality and fast transfer speed

Excellent speeds, but appears as a fixed drive and thus cannot be used to install Windows

Excellent speeds and a quality feel to it.

So fast speed!

Write speed great

Great speeds

Great Speed!

Does a good job, decent speeds.

The speed is great.

Im not a fan of the ugly design, but the speed is so awesome that Im still giving it 5 stars

: 97.9 mb/sThese were basically the speeds advertised on the package as well, which is a rare site

very high speed :) happy

Copies big files in fast speed

I thought super small USB drives were fun but their slow speed, and tendency to get lost in my pockets, made them worthless because I need usb sticks for quick transfers and not to plug into my laptop or phone on a permanent basis

Best speed so far with all tested USB flash disks I did

The speeds that this drive offer means that it should be more than adequate for being a portable OS drive (I quickly tested ubuntu and it worked flawlessly).One thing to note if you're planning on buying one of these drives is that they aren't the most durable things in the world

I thought super small USB drives were fun but their slow speed, and tendency to get lost in my pockets, made them worthless because I need usb sticks for quick transfers and not to plug into my laptop or phone on a permanent basis

Works great, and has a decently fast write speed.

Great product, quick speeds and the thing is pretty durable

Be sure to avoid the smallest size if performance is your focus, since it also has slower speeds.

The read and write speeds are phenomenal in comparison to some the other drives

Good product fast writing speed nearly compatible with anything a must have if you use a Android Tv box Im currently use this on my Nvidia shield Tv

Been getting better speeds than what it advertises, installing windows with this was the fastest I've ever done.

Works great and the speed is super fast!

The only extreme thing about this is the extremely slow speed at which it runs.

I could probably get better speeds if I did not copy from my slow storage drive or if I used a different partition

Excellent R/W speeds

Great speeds, and large size

Ohhh love the speed

A little longer than I anticipated, but speed is great and extends well

Excellent transfer speeds.

slot!And if encryption is your thing then this drive doesn't have its advantage in speed anymore, since encryption slows down the writing speed(a lot!

I like the speed but not the excessive heat.

I've gone through probably 15 different drives trying to get the best speed and form factor

Very fast transfer speeds.

Incredibly fast speeds from a usb stick

Even in a 2.0 port, you'll still get the top speed that port is capable of -- and in a 3.0 port, you'll finally see why 3.0 is so much better than 2.0.Highly recommended!

nice speed and good fidget toy feel

The speed is amazingly fast as you can read in many reviews (above 100 MB/s)

BLAZING fast speeds, easily beats out all other usb 3.0 drives I have used

With the Extreme CZ80 the write speeds are nearly as fast as the read speeds (about 85%-90% as fast)

Pros:Best overall speeds for any USB drive, on par with a slow SSD.Cons:Don't like the flip in and out mechanism at all; creates point of mechanical weakness

I loved this, High quality, High speed ....

The Sandisk Extreme was slower for a few big videos (110 MB/s), but for smaller files such as music was about 3 times faster (50MB/s)

(250MB/s is no joke)- Fit on my keychain and was easily accessible and impossible to forget (can't drive without it)- Everything

I did a speed test on it in a 2.0 port and I got a solid 30+MB/s write speed which is pretty good for