Gets crazy hot and has slow write speeds
358377
Title says it all.  Bought this to bring some movies with me backpacking.  I have it plugged into a USB 3.0 port and the highest write speeds this thing will hit are just over 30MB/s.  Tried it on another computer (Surface book) just to be sure.  Haven't check read speeds yet.  At least it is high capacity?
292622
It works, but it's horribly slow. Writing files takes 10x longer than other thumb drives I use.

I see this in other reviews and the low price is usually cited as a good reason to deal with the slow speed, but for another dollar the Sandisk Ultra USB3.0 drive is a much better pick.
1853963
Works great as medium to quickly transfer or copy files. It's quite fast too. However, it get extremely hot plugged in, and it's not suited for constant reading/writing storage.
3639897
Fast transfer speeds and a large capacity for a cheap price. I was worried because a couple reviews talked about how hot this drive gets and one even said he had to put Raspberry Pi heatsinks on it.
While it does get warm, even while just being plugged in, I haven't touched it and though, oh wow that is hot. More like a little over slightly warm and then once you touch it, your fingers dissipate the heat. I haven't filled the drive up in one sitting to test it, but I did transfer about 75gigs of data to the drive at one time with files of various sizes and types. It never really got as hot as what was implied.

--- Edit ---

So after 5 months of use, this thing stopped working. I looked into the connection side and there were prongs inside that were all bent up. I did my best to straighten them out and it kind of worked for a minute, but after copying files from my work computer, I brought it home and putting it in a 2nd computer bent the prongs again. I figured it didn't cost a lot, so I cracked open the case to better get to the prongs. All 5 prongs were folded under themselves, and when I attempted to bend them back out, they snapped off. I think I had everything but new files backed up, so I don't think I lost too much data, but still. I expected it to last a lot longer than 5 months.
2971688
Pretty poor product. I didn't pay a ton for it, but I wish now that I had saved up another bit of money and bought a Western Digital 1TB Green. This Drive doesn't operate poorly and is actually quite fast but it gets hot in my case, roughly 43C. I could buy a new HDD or get a cheap cooling alternative.
2154387
I was hoping I'd get a good one. The form factor and capacity is EXACTLY what I need, especially since I wanted it to be a permanent addition to my Lenovo Yoga 700 laptop (plug it in and forget it). Many of the reviews mention this little drive getting hot after transferring a significant (more than a gig) amount of data. I wrote about 7.4GB of data from a USB 3.0 My Book to this 128GB Ultra Fit drive. The speed starts out around 60-64MB/s, but soon drops down to the 40MB/s range. Over the course of 5+ minutes, the write speed fluctuated like a kid on a pogostick, never holding steady over 50MB/s and 3/4 of the way into the write operation it dropped down into the 1.7MB/s range, which is just unacceptable, considering it's advertised on the package as performing at 130MB/s (you should expect 50-60MB/s write speeds out of that). After the transfer was complete, I ejected and removed the drive and it was, indeed, very warm to the touch, well over 100 degrees F. The heat, most likely, is what's affecting the reliability and performance of the transfer rates, at least on the one I had. I let it cool off, then plugged it back in, deleting the files transferred, and trying again with the exact same files from the same source, even using the same USB 3.0 port on my laptop. The results were the same. This is disappointing, considering the reputation SanDisk has had as being the best in the market for years. Their SD and microSD cards likely fall into the reliability of their reputation, but this little flash drive does not.

As a comparison, I performed the exact same test, same source and USB port, with a Lexar 128GB USB 3.0 drive. It was like night and day, the performance was so different. The transfer started at 67MB/s, then held steady in the 60-64MB/s range, with one second fluctuations down to 57MB/s then immediately back up to the 64MB/s range, consistently, with my 7.4GB transfers taking about 2 minutes (I just did another test while writing this and timed it at 2 mins 2 sec with the same 7.4GB worth the files). I tried again with the SanDisk, hoping it was a fluke after getting such good results with the Lexar, only to get the exact same results as before. Unfortunately, I have decided to send the SanDisk Ultra Fit 128GB drive back and have two more Lexars on the way, at the time of writing this review. With the extreme differences in performance between the two, the Lexar drive is the most logical choice.
2331118
I'm getting great read and write using BlackMagic and so far,no heat issues, but I'm making it an issue not to keep it hooked up too long.  It's replacing a USB 2.0 Flash drive, and it's going a great job... now to see if it lives long even with it's limited use I plan for it.
1613259
Disappointing write speed. Best I could get was 18 MB/sec in a USB 3.0 port. I tried a 64GB version of this ADATA device in the same port and was writing at 80 MB/sec. Must be a different technology in the larger device.
1768752
Super slow transfer speed. Used BlackMagic Speed Test app and the Write speed test was around 3MB/s and Read 10mb/s.
Was suspicious when saw how it was transferring files really slower than my other USB 2 drives. It is more like USB 1.0
Awful performance.
Feel RIPPED OFF!
4670779
the usb ports heat up very fast may just be the cable ima using i don't know give me feed back if u have the same experience
135280
slow read/write speeds, doesn't seem like usb 3.0 to me
1656402
Just returned it after some testing. The read speed was OK at around 120MB/s, but write speed was incredibly slow at around 35MB/s. I crosschecked this with one of my other USB 3.0 flash drives on the same port, and the performance is abysmal. I even tried to reformat the drive to either NTFS or exFAT, same results.
Very disappointing as I was really looking forward to the small form factor.
2117384
Crazy slow write speeds. Thought this would be a good backup for travel, but it would take over a day to copy the files.
2296799
1 makes clicking noise but it seems fine and they write extremely fast. I get 175~200MBs and my wd black only get 130. So it has my attention
4214763
This is SUPER FAST, I mean, I have LOTS of Flash Drives... tons of them... and this one outperforms them all.

HOWEVER...

This will also get SERIOUSLY HOT. It can burn you! So my advice? Buy it, LOVE it... but when you transfer LOTS of files or LARGE files, let it cool off a bit before you remove it from your computer so you don't burn your fingers. This is usually only a problem with WRITING to the drive. Reading only seems to make it warm...
1607702
It is fast. its not quite 130MB/s but it is fast. But the problem is heat. It gets hot within 5 mins of plugging it into the laptop. If you are planning to keep it plugged in for extended period of time then this is not for you.
3200619
The drive gets very hot quickly. I had protected it using Bitlocker and after a few cycles of connecting, disconnecting it started to misbehave. Bitlocker/Win10 would recognize the encrypted drive and prompt me for the password, After entering the password successfully, it would show me an error "Insert a Disk into Removable Disk USB Drive". No matter how many times i tried. I think the heat may have caused some internal problem. It's a shoddy product and needs to be redesigned. I would not count on this to reliably and safely store & retrieve important data.

https://www.amazon.com/gp/product/B01EZ0X55C/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1