This is one of the best USB 3.1 Flash drive available.Connected to a USB 3.1 Port on my Asus Motherboard and transferred a 32 GB folder from pc to drive in under 4 minutes..Avg speedRead - 160 mbpsWrite - 120 mbps ( Max 150 mbps)These are even faster than HDD.Just make sure to install the correct driver from you motherboard CD.

Pros - Very nice nd very fast. Backward compatible with usb 2 with decent speed (Best in the market right now. Comes with 3 years replacement warranty. Cons - Not yet Others Thoughts - Bought this for 4000 rs with COD option nd Flipkat delivered it fast within 2 days but after paying for this, couple of hours l8r flipkart slashed its price to 3750. @Gaurav Sareen Man looks like u really got sum shi**y pendrive, may be a duplicate or sumthing like tht becoz mine working flawlessly nd I did a whole lot of research before buying this and one more thing, if u r not certified buyer then dont post negative comments here. I mean just look at the galaxy s4 ratings 233 people rated tht phn 1 star just becoz they cant afford it or they r simply samsung haters. Thts simply sucks(Dont know why flipkart allow these kind of people to comment and rate on the website)

This is the fastest USB 3.0 drive right now in the market which doesn't cost a bomb. You'll really appreciate it's speed if you are copying stuff from/to a SSD on your PC/laptop. Regular hard disks are too slow and wont' match up to what this pendrive can deliver. ONLY DRAWBACK - It's detected as a fixed drive and not a removable drive. That's the way SanDisk chose to manufacture this. So this cannot be used as a bootable USB drive.

In the 80s or 90s, generally across all product ranges, if you paid more money for a product, you would get a well built product that would also perform well. The same can't be said for most products of this century. These are exactly the impressions I get when I review the Sandisk Extreme 64GB Pen Drive. Having been spoiled by Corsair's Voyager series of USB Drives which have become the reference for a very well built, high performance product, I decided to try something different and went in for this drive. While the performance of the Sandisk drive is good, the build quality leaves much to be desired. Maybe I'm being too fussy but the product feels very light in the hand and on shaking the device, there is a light rattle that comes from the plastic. It's not at all a dealbreaker if you ask me but a Corsair Voyager GT would be a better purchase than this drive as you will get both good performance and good build quality i.e. a complete, high performance product. Pros: Good performance. This is why you are paying twice the price than similar sized 64GB USB drives. Cons: Flimsy build. It's not all bad. The connector retraction mechanism has a nice feel to it. and the matt plastic finish avoids fingerprints but for this price, one can expect better build quality from Sandisk. The model number mentioned is SDCZ80-064G-X46 but I received a product with model number as SDCZ80-064G-G46. A little research on the internet reveals that there are three such model numbers for this device but there is no difference in performance across the models. Nevertheless, Flipkart should make this correction in the product description but based on my previous feedback to their customer service, I don't think that they'll ever bother to do anything about it.