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Newbie
Posts: 1
Registered: ‎02-11-2016

Re: Ultra Fit USB 3.0: Excessive Heat

Pretty disgusted with the way you have all been treated. I too had an Ultra Fit - albeit 128gb with the same problems./ Today I exchanged it to a comparable one made by Strontium and it is running fine. 

 

When will companies realise that the way they deal with customers if things don't go according to plan (i.e. defective goods) is enough to lose their custom.

 

I for one will not be buying san disk anymore. 

Newbie
Posts: 5
Registered: ‎01-05-2016

Re: Ultra Fit USB 3.0: Excessive Heat

My 64GB FIT has run very hot from day 1 when copying files or formating. It is so hot I can't touch the metal part for more than 2 sec while in use and I have to wait a few min to cool down after pulling it out. While at idle it is just slightly warm. I only use it in a 3.0 port on my 1 year old MSI gaming laptop. It obviously is not a hardware issue since there are so many reported heat problems even in new computers. A design flaw in the Fit has to be the problem . I'm also getting terrible write speeds of only 23MB/s when it should be around 100 MB/s. My read speeds are better than spec at 145MB/s but that doesn't make up for the write speed. I will not get any more Ultra Fits at any price, I will try the Extreme 64GB next.

Newbie
Posts: 3
Registered: ‎01-27-2016

Re: Ultra Fit USB 3.0: Excessive Heat

[ Edited ]

To continue my previous post...

(I wrote this already, but my post got lost, so I'm typing it in Notepad first... yeah, that's handy).

I contacted SanDisk support about my issue. They assured that the drives were tested for safety and compliance, but they agreed to replace them by another equivalent model. The RMA process took  ~2 weeks and in the end I got my UltraFit drives replaced by 2x full size "SanDisk Ultra USB3 64GB". They seem to work fine without issues - there is no speed drop and the drive remains barely warm during large file transfers (~10GB).

Despite I was not happy with the product (UltraFit), I admit that SanDisk support was helpful and resolved my issue by replacing the drives with another equivalent model.

Thank you!

 

PS: certain people with a "Guru" badge here claim that the issues are caused by filesystems or some other mythological reasons. That's wrong. A storage device should not care what filesystem or OS is used as it should be designed to work correctly under any load providing the ambient environment is within its limits. Please do not confuse people with your silly myths.

Newbie
Posts: 20
Registered: ‎10-18-2015

Re: Ultra Fit USB 3.0: Excessive Heat

@artci: "replace them by another equivalent model", did you mean they were not replaced with Ultra Fit? Any chance to share what is the repalcement model which works well?

 

"there is no speed drop"... would you mind to share what is the average write and read speed you can achieve with the replacement model?

 

Agree with your comments re. filesystems.

 

Newbie
Posts: 10
Registered: ‎02-05-2016

Re: Ultra Fit USB 3.0: Excessive Heat

I guess enough people have replied... but here's my reply from experience: Yes the ultra fit does get too hot, but its ok - there's no problem other than that. Its been working fine for me for the past 1 year with moderate activity. Just some thermal dissipation folks, bear it for the small size Smiley HappySmiley Very Happy

Newbie
Posts: 20
Registered: ‎10-18-2015

Re: Ultra Fit USB 3.0: Excessive Heat

@electronicsguy: have you had a chance to see the case of one of the poster here? http://imgur.com/a/sEtdj

 

Newbie
Posts: 20
Registered: ‎10-18-2015

Re: Ultra Fit USB 3.0: Excessive Heat

I did a small temperature measurement test.
 
With the ambient temperature around 30'C, the Ultra Fit temperature is as high as 68'C during files were copied into it and the copy process looks like "intermittent" while the transfer speed dropped to around 18 MB/s (while usually it could reach up to 45 MB/s or higher).
 
When I put a fan continuously blowing directly to the Ultra Fit (at approx. 8 cm distance), the temperature dropped to 46'C.
 
The temperature was measured with Infrared Thermometer which has 1.5'C accuracy tolerance.
 
The Ultra Fit specification as stated in Sandisk portal is:
 
https://www.sandisk.com/home/usb-flash/ultra-fit-usb

 

 

Available capacity:16GB, 32GB, 64GB and 128 GB
Performance/Speed:Up to 130MB/s read; write speeds lower
Dimensions:19.1 x 15.9 x 8.8 mm; 0.75 x 0.63 x 0.35 in (LxWxH) – without cap
Operating Temperature:0 C to 45 C
Storage Temperature:-10 C to 70 C
Compatibility:USB 3.0 (backward compatible with USB 2.0)

 
Does this mean my Ultra Fit temperature during file transfer (WRITE) at 68'C has way surpassed the specified max Operating Temperature (which is 45'C)? Would anyone kind enough to shed-the-light?
 

 

Newbie
Posts: 3
Registered: ‎01-27-2016

Re: Ultra Fit USB 3.0: Excessive Heat

@Chin

"did you mean they were not replaced with Ultra Fit? Any chance to share what is the repalcement model which works well?" - SanDisk Ultra USB3 64GB, I did not chose the model, but specifically stated that I do not want a microdrive anymore.

 

"would you mind to share what is the average write and read speed you can achieve with the replacement model?" - a quick test shown ~100MB/s sequential read and ~50MB/s sequential write. While not great, but it is fine - also the flash drive remains barely warm with a load that killed the UltraFit (copying to flash drive a VHDX disk image of size ~10GB).

 

I am happy now with the "quality for price" I got with these new drives.

Newbie
Posts: 10
Registered: ‎02-05-2016

Re: Ultra Fit USB 3.0: Excessive Heat

 @chin .. well one person doesn't mean anything. As I've said from experience...using it for a year, moderate use. no problems.

Newbie
Posts: 10
Registered: ‎02-05-2016

Re: Ultra Fit USB 3.0: Excessive Heat

@chin how did you measure the ultrafit temperature?