SanDisk SD8SN8U-128G-1122 X400 M.2 SSD 128GB

Great for making a portable SSD instead of paying just as much for a slower USB 3.0 or 3.1 flash drive. Maintains read and write speeds of 300mB/s +Will update on longevity of drive and how well it holds up to constant use and being carried around in a backpack every day (inside a SATA M.2 USB C enclosure though)Edit: 11/07/2018Drive still holding up extremely well. I've probably transferred over 4tb of data across this drive and leave it plugged in most of the time to watch movies and TV shows off of that are loaded to it. Has yet to glitch on me once, only the m.2 housing that it's in has given me any sort of issue and the seller of that item resolved the issue by sending me another.

Works great. Win 10 boots much faster than using traditional hard drive.

This seems to be a pretty good device. I am pretty technically competent, but not a lot of experience with M.2 devices. I had a 64 g SanDisk fail on my Dell Venue 11 tablet and read that the 128 would work. A word of caution: not all m.2 SSDs are the same size. This is considerably longer than the 64g device that failed in my tablet. (I know, the size IS listed on the product description) I was able to get it to work by modifying the case a bit (somewhat nerve wracking), but after that it worked like a champ. I assumed that m.2 SATAs would be a standard size like mSATA. Big surprise for me that it was not. Check your device you are replacing and make sure that this will fit. Other than that, seems plenty fast and a good value.

Great product and caught it on sale, transfer speeds are as described not had a single issue. I used this with an external usb 3.1 kit from Silverstone and could not be happier with it.

Exactly as described. Super easy to install and very fast transfer rates. Very pleased with this budget-friendly drive. Would recommend!

Despite being used, the product came in working condition. I had some problems getting it to work but that was user error, always make sure to activate the drive when you get it.

2 full months of use and these drives are already dead. Sandisk has made some great products that I have loved over the years and this isn’t one. Both drives are used up and reading as 0%usefull life. They were used as read only drives and not written to that much. Should have gotten decades not months of use.

SSD works great so far, was not shipped in retail packaging however.