Ultra Fit USB 3.0: Excessive Heat

Or will Sandisk replace them with units that don’t suck?  

That’s the plan.

http://kb.sandisk.com/app/answers/detail/a_id/5232/~/return-material-authorization-(rma)-process

@kjh I guess everyone’s experience is different. I can say that I’ve used the ultrafit on my laptop and raspberry pi (continuous use) without any problems. Yes it does get hot, but its within design specs. The USB ports should not have been damaged by this heat. Of course if you could prove that the heat is outside typical USB design specs, then you would have a case.

I don’t see why Sandisk has to replace them since they dont “suck” in the first place. They’re tiny so they’re hot, get over it.

So you admit that these things suck…  Why would I want a direct replacement?  This Removed  is going in the trash.  

Btw, I am surprised at the level of Removed  you Sandisk representatives have.  


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slotmonsta

1.) No one replying in this thread is a SanDisk employee or representative; only users like (or maybe not) yourself.

2.) I can’t see where anyone replying has admitted that these drives are categorically defective.

3.) There really is no need for the vulgarity in your reply.

You guys have thousands of posts on a forum for flash drives and don’t actually work for Sandisk?  

@kjh… if you can’t speak in a civilized fashion, it’s best that you don’t. No-one here is a sandisk employee. And there is no fndamental problem with the drives. If you have an issue, write a letter to sandisk rather than ranting here about non-existant problems please. Let’s move on.

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Hi guys, recently purchased the 16GB version of the Ultra Fit.

The reason this device is overheating is due to power draw via the USB 3.0 interface. I ran CrystalDiskMark with this drive sitting on a USB 3.0 port, and then a 2.0 port (both connected to motherboard on laptop).

When hooked up to USB 3.0 the Ultra Fit got ridiculously hot, to the point at which it felt like the end of a hot glue gun. When connected to USB 2.0 it was STILL HOT but tolerable.

Scores for USB 3.0:

Sequential Read  125.685 MB/s
Sequential Write 34.706 MB/s
Random Read 4KiB  : 5.780 MB/s
Random Write 4KiB  : 1.553 MB/s

Scores for USB 2.0:

Sequential Read : 41.072 MB/s
Sequential Write  : 25.743 MB/s
Random Read 4KiB : 5.357 MB/s
Random Write 4KiB  : 1.712 MB/s

According to the scores it appears that on USB 2 the drive takes a massive hit on Reading, but Writing and 4K R/W is actually fairly similar. THIS IS DUE TO THE POWER DRAW. 

Therefore, I would use USB 2.0 if transferring large files- the transfer rate will be slower but heat will be tolerable. For small files transferring via USB 3.0 would be far quicker, though less safe.

Its a brutal shame that SanDisk markets a drive for USB 3 that can pretty much be only be safely used with USB 2.0. SanDisk needs to find a balance between the two.

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So SanDisk quietly updated the models with what appears to be a small incredmental upgrade, but no changes to the physical body. Any idea if this is to address the heat issue?

I have severl 128gb UltraFit models and I generally have to use them at USB 2 speeds. I’ve always been under the impression that SD cards can function just fine with extreme heat, but USB flash drives do not have nearly as much thermal resistance due to differences in the controller.

From a design perspective, SanDisk should have used aluminum…this would make a huge difference in regards to internal temperature.

@> ZapNZs wrote:

> So SanDisk quietly updated the models with what appears to be a small incredmental upgrade, but no changes to the

> physical body. Any idea if this is to address the heat issue?

 

Guess not - I just got in a 128GB 150MBPS one and it overheated and did the repeated disconnect/reconnect thing when I tried to copy a folder of several GB to it :frowning: . I moved it to a USB2.0 port and so far it’s only running stoopid hot but not flaking out. I only need it to hold some .wav files to play on my .wav only device and will rarely write to it so I can live with that. Definitly not usable on a USB3.0 port! I need the low profile so I can leave it inserted in my device - a “standard” sized one wouldn’t work for me. I also have a 32GB one I bought a couple months back - I didn’t notice any problem with that one.

@kjh wrote:

You guys have thousands of posts on a forum for flash drives and don’t actually work for Sandisk?  

Yeah–awesome, isn’t it?    :wink:

This is kinda bull**bleep**, sandisk seems to ignore this issue and seems ok with it.

I bought a 128GB thumb drive to be used in my “mini-nas” but that seemed like a no go.

Started transferring files from my old server to new server onto the sandisk thumb drive and after like 20-30sec, the copy process just stopped. First I thought it was some other issue but then I noticed how insanely hot the thumb drive was. Found by various forum threads that the drive kinda disconnects after copying large files but small files (and not too many) worked ok.

Saw some replies from sandisk representatives that the heat isnt an issue and I decided to proove them wrong.

Here´s my “ghetto modded” thumb drive

http://imgur.com/a/V9xd4

Now it works and I have no issues with the thumb drive disconnecting when reading or copying files.

Thought id share it if anyone have any use for the info.

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You’re going to simply have to use the drive with a USB 2 port. The USB power draw is limited when connected to the 2.0 interface, and thus does not get nearly as hot.

Of course, read and transfer performance takes a hit, but its the safest way to use the drive. Might as well return it.

@deebs: Your mod has proven that the overheat issue impacted the drive’s performance (which has been suspected by many of posters here). In one hand, this solves the overheat issue while in other hand, it might against the purpose of people buying this tiny USB stick.

@negusp: I had the same experience that the drive works well under USB 2.0… but this against the purpose of buying a USB 3.0 drive (speed concern).

I just received my Sandisk Ultra Fit USB 3.0 128GB Flash Drive with great excitement.

On package: SDCZ43-128G-Q46 and 80-56-14876-128G

On Flash Drive: BP160525497D and SDCZ43

I inserted my new Ultra Fit USB 3.0 128GB Flash Drive into my HP Pavilion Desk Top

and began copying my music and video files to it. I reached down to remove it

and it burnt my finger and left a blister. WTF ??? 

I’m 65 years old and have been in the computer industry for 35 years.

How can any company release such a flawed piece of technology.

This drive, in my opinion, should not be sold. They can cause USB port damage.

They should be recalled and replaced with safe units.

Sandisk, you burned my fingers and created blisters. There is no warning regarding

a burn hazard and handling instructions on your packaging.

I plugged your product into a 2.0 USB as instructed and I was burned.

Sandisk please contact me.

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I just received my Sandisk Ultra Fit USB 3.0 128GB Flash Drive with great excitement.
On package: SDCZ43-128G-Q46 and 80-56-14876-128G
On Flash Drive: BP160525497D and SDCZ43
I inserted my new Ultra Fit USB 3.0 128GB Flash Drive into my HP Pavilion Desk Top
and began copying my music and video files to it. I reached down to remove it
and it burnt my finger and left a blister. WTF ???
I’m 65 years old and have been in the computer industry for 35 years.
How can any company release such a flawed piece of technology.
This drive, in my opinion, should not be sold. They can cause USB port damage.
They should be recalled and replaced with safe units.
Sandisk, you burned my fingers and created blisters. There is no warning regarding
a burn hazard and handling instructions on your packaging.
I plugged your product into a 2.0 USB as instructed and I was burned.
Sandisk please contact me.

“I plugged your product into a 2.0 USB as instructed and I was burned.”

Are you sure it wasn’t a USB3.0 port? Mine’s been running reliably and less than blistering hot since I stopped using a USB 3.0 port for it.

…and this is a user’s forum, fat chance that Sandisk will reply here - especially on this product LOL.

It says USB 3.0 which I assume means designed to use in a USB 3.0 port. Backwards compatible with USB 2.0.

my computer has 2.0 on the front - even in a TV USB port or Andriod TV box this thing burns too hot for reality.

but thank you for your feedback

Well, if you think it gets hot in a USB2.0 port you’d freak at how hot it gets in a USB3.0 port LOL. It gets so hot that it shuts down after a couple minutes of being written to. I can’t beleive it didn’t burn up but it’ll start working again after cooling down.

I have just ordered a few of these (in total I have approx 8 of these USB3 32GB and 64 GB)

They were selling cheap.

I too noticed excess heat.

Does anyone have a link to an official Sandisk posting, saying that we do not have to worry about data loss ?

I can live with burnt fingers, as long as I do not risk losing data already stored on them

Potential loss of data could have me jumping off a cliff (as a Scot would be bereft if he thought he could lose data after all of those purchases)

Rob