How can Sandisk get away with this - even allowing for the industry norm of dividing by 1000 (and not the correct 1024) to convert from bytes, it’s not even 64000 !!! RescuePRO® Deluxe file recovery software 4 helps you restore files, even if they’re accidentally lost or deleted. With capacities up to 512GB 6, you can store more of your critical files and important photos, videos, and more. I’ve tried the drive in both a USB hub and directly on the ports on my motherboard. They both cause it to fail eventually. I can concur. My 128Gb Ultra Fit runs too hot as well. To the point where it begins to disconnect and reconnect constantly. The only solution is to cool the drive down and resume operations. However it only takes around 5 minutes of copying before it begins to exhibit problems.

SANDISK Ultra Fit USB 3.1 Memory Stick - 32 GB, Black - Currys SANDISK Ultra Fit USB 3.1 Memory Stick - 32 GB, Black - Currys

Based on read speed. 1 MB/s = 1 million bytes per second. Based on internal testing; performance may vary depending upon host device, usage conditions, drive capacity, and other factors. USB 3.0 port required. In my computer’s USB3, my receivers’ (One Onkyo and the other a Denon) and my samsung Bluray I have noticed heat issues… Reading and Writing to the Ultra Fit on my Acer laptop didn’t have any disconnects, but the metal part did get really hot.

I bought the SanDisk USB OTG 64GB thumbdrive, it feels hot at the USB connector, but not as hot as Verbatim 64GB Thumbdrive, If you look closely Cruzer has 6 vents/cutouts in its sheet-metal. So it provides a better heat dissipation. Whereas Ultra Fit has none. I found this same problem. And the main reason is that it poorly designed when compared with Cruzer Fit. Designed for plug-and-stay storage, this compact flash drive works with laptops, tablets, TVs, gaming consoles, car audio systems, and more. Plug it in, and you’ve got instant storage that’s always available!

UserBenchmark: SanDisk Ultra Fit USB 3.0 64GB SDCZ43-064G-G46 UserBenchmark: SanDisk Ultra Fit USB 3.0 64GB SDCZ43-064G-G46

So I tried it with a USB 3.0 extension cable and it also gets too hot to touch, but I don’t think my transfer went long enough to have it disconnect. I’m going to try it with my laptop’s port after it cools down. I know this is a rather old thread, but I wanted to post my experience with this device too, as it is a little different from yours (and nearly everyone). I’ve tried blowing cool air regularly into my USB hub and it appears to remove the disconnect issue, which clearly shows that this is a heat issue.I’m wondering if this is due to the LED in the case that is constantly (24/7) blinking and drawing power? Maybe this was designed to only blink when read/write???

SanDisk Ultra Fit™ USB 3.1 Flash Drive Datasheet SanDisk Ultra Fit™ USB 3.1 Flash Drive Datasheet

I bought the 64GB Ultra Fit to use as extra storage for my Chromebook. After leaving the Ultra Fit in either the USB 2.0 or 3.0 slots for a mere 5 minutes it gets considerably hot. Even AFTER ejecting the drive and leaving it in it is still getting hot. In the 3.0 slot it gets so hot you don’t want to hold it. I also noticed right after I plugged the flash drive (Ultra Fit 3.0 - 32 GB) for the first time that it got insanely hot, even after transfering files from or to the device and having it ejected. This happened in every port in my desktop computer, 2.0 and 3.0. However, I brought the flash drive to work this morning and transfered over 25 GB to my work desktop (2.0 ports only). It took about 8 minutes to do it and it didn’t even get a little warm, nothing, which suggests that the problem has something to do with the ports the flash drive is connected to, and not only the the drive itself. Please see this link below for the image for such vents/cutouts. There are 2 on each side of the sheet-metal.

as far as i could research the heating case for the ultra fit i found out that its becoming so hot because of the small size of the drive and that its not plastic. And came to this forum by searching ultrafit exesive heat after transfering 5 1,5 gb files first through a usb port, then through a USB 3 hub. The Verbatim branded thumbdrive get really hot(whole body is aluminium) even if plugged into smartphone after prolonged use.